Runaway stars to fill in the blanks in Milky Way map

GUIDES to the galaxy might call it Zona Galactica Incognita – the half of our home galaxy we know little about. Indeed, the Milky Way is one of the least charted spiral galaxies in the nearby universe. Now it seems that stars kicked out of their birth clusters can help fill in the void and create the first proper map of the entire galaxy.

Young star clusters and clouds of hydrogen that formed in our galaxy help trace the shapes of the Milky Way's arms, so astronomers are reasonably certain that it has a spiral structure (see right). Observations of stellar motion show that there is a supermassive black hole at its core.

But figuring out how fast the arms rotate or even counting how many there are is tricky, in part because we are embedded in one of its arms and unable to get an outsider's view. In addition, everything behind the galactic centre is shrouded by a dense wall of stars and dust, blanking out a whole area of the Milky Way map.

"It's quite difficult to see the actual structure," says Manuel Silva of the University of Lisbon in Portugal. "I'm a little upset, really, that we don't know our own galaxy that well."

A space telescope called Gaia, scheduled for launch later this year, will map the positions and distances of about one billion stars on our side of the Milky Way, plotting the three-dimensional structure in unprecedented detail. But even Gaia won't be able to pierce the material that blocks our view of the far side.

Instead of trying to look across, Silva and his colleagues suggest looking up, where hundreds of runaway stars fly high above the disc of the galaxy. These stars are born in clusters inside the Milky Way but get ejected during gravitational jostling with other stars. Precise measurements of their velocities, ages and distances would allow astronomers to trace the stellar fugitives back to their homes, even on the far side.

"The idea is that the runaway stars act as signal flares, showing the position of the spiral arm, the same way someone lost in the middle of a dense forest could fire one to the sky to show his or her location to an outsider," says Silva.

His team traced the origins of about 40 runaway stars, observed by the Hipparcos satellite, ranging from roughly 1000 to 100,000 light years above the galactic plane (arxiv.org/abs/1302.0761v1). Although none of these stars came from the far side, the technique seems to work because the results agreed with previous studies that mapped star clusters in the visible section of the galaxy.

"The idea is a new one, and is an interesting one," says Jacques Lepine of the University of São Paulo in Brazil, who was not involved in the new study. Comparing Gaia's view of stars with the runaways will be helpful, he adds. "It is good to have different methods, to compare results. If the results are similar, we get more confident."

Jacques Vallée of the Canadian National Research Council in Victoria, British Columbia, agrees that the proof of concept is impressive. But that doesn't stop him fantasising about easier ways: "Wish I had a friend on a planet around a runaway star in the halo, sending me back a photo."

This article appeared in print under the headline "Runaway stars flesh out Milky Way map"

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Scientists discover new owl species in Indonesia

JAKARTA: Researchers in Indonesia unwittingly identified a new species of owl believed to be unique to the country, raising hopes of further new bird discoveries, a scientist said on Thursday.

The brown-and-white Rinjani Scops owl was first spotted in 2003 on the island of Lombok, while researchers were looking for another nocturnal bird. It was formally identified by four scientists on Wednesday in the online "Plos One" journal.

Prior to that, the bird had been mistaken for the related Moluccan Scops owl, found in the Maluku islands in central Indonesia.

"Ornithologists have long patted themselves on the back, believing that the taxonomy of birds was almost complete," researcher George Sangster from the Swedish Museum of Natural History, told AFP.

"Our study shows that even after more than 250 years of taxonomic research, we can still find new species, even of birds."

Sangster discovered the bird days before another researcher, Ben King, made the same discovery independently when both were on the island to collect sounds of large-tailed Nightjars.

They noticed the owl's songs were "completely different" from the Moluccan Scops owl.

He said further research should be carried out on the nearby island of Sumbawa to verify if the bird was unique to Lombok.

Ornithologists have often overlooked Lombok during field work in the region, believing there were no endemic bird species there, Sangster said.

Sangster has called for more research on birds in Indonesia, a sprawling archipelago of around 17,000 islands that he calls "a treasure trove for taxonomists".

The Rinjani Scops owl was named after the volcano in the heart of Lombok island.

- AFP/al

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Woman found killed in home of 'blade runner' Pistorius

STORY HIGHLIGHTS

• NEW: Agency identifies the victim as Oscar Pistorius' girlfriend


• The shooting occurs in the home of Pistorius


• South African police say man, 26, was taken into custody


• Pistorius is a double-amputee who ran with the aid of prosthetic limbs

Pretoria, South Africa (CNN) -- The 29-year-old girlfriend of South African Olympian Oscar Pistorius was found fatally shot in his upscale Pretoria home early Thursday, authorities said.

Read more: Who was Oscar Pistorius' girlfriend?

Police charged a 26-year-old man -- the same age as Pistorius -- with murder in connection with the shooting and said he will appear in a Pretoria magistrate court Thursday afternoon. But they would not say whether the suspect was Pistorius.

"We can confirm he was taken to a police station but can't confirm if he is the suspect," said police spokeswoman Denise Beukes. "You will find out in the afternoon."

Pistorius, nicknamed the "Blade Runner," made history when he became the first Paralympian to compete in the able-bodied Olympics last year.

The victim was model Reeva Steenkamp, according to Capacity Relations, the agency that represents her.

Beukes said the home did not appear to show signs of forced entry and that Pistorius and the victim were the only two people at the time of the shooting.

She also said there had "previous incidents" at the home.

'Blade runner' Pistorius: Track hero at center of shooting probe

"Allegations of a domestic nature," Beukes said.

Police said Pistorius was cooperating with them.

Several South African media outlets reported that the woman was mistaken for an intruder.

Beukes said she was aware of the reports, but that they did not come from the police force.

A spokeswoman for Pistorius declined to comment. His father, Henke, told the South African Broadcasting Corporation said Pistorius was "sad at the moment."

"I don't know nothing. It will be extremely obnoxious and rude to speculate," the father said. "I don't know the facts."

Police were alerted to the shooting by neighbors and that residents "heard things earlier," Buekes said.

A pistol was recovered at the scene, police said.

South Africa has a high crime rate, and it's not unusual for homeowners to keep weapons to protect themselves from intruders.

"This is a very quiet area and this is a secure estate," Buekes said.

Pistorius, a double-amputee, ran with the aid of prosthetic limbs during the London Olympics last year, the first Paralympian to compete in the able-bodied Olympics.

The runner's legs were amputated below the knee when he was a toddler because of a bone defect. He runs on special carbon fiber blades, hence the nickname.

While he failed to win a medal in the Olympics, his presence on the track was lauded as an example of victory over adversity and a lesson in dedication to a goal.

Pistorius was initially refused permission to compete against able-bodied competitors, but he hired a legal team to prove that his artificial limbs didn't give him an unfair advantage.

He smashed a Paralympic record to win the men's 400m T44 in the final athletics event of the 2012 Games.

The athlete was named one of People magazine's Sexiest Man Alive last year.

CNN's Nkepile Mabuse reported from Pretoria, and Faith Karimi wrote from Atlanta. CNN's Richard Allen Greene and Marilia Brocchetto contributed to this report.

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Couple: "Calm" Dorner tied us up in our condo

LOS ANGELES A California couple says fugitive ex-police officer Christopher Dorner tied them up in their mountain condominium and stole their car before the firefight that led to his presumed death.

Karen and Jim Reynolds said at a news conference Wednesday that they came upon Dorner when they entered the condo in Big Bear, Calif. Tuesday, and believe he'd been there as early as Friday.

They say Dorner had a gun but said he wouldn't hurt them.

Play Video

SoCal breathing easier after deadly standoff

CBS Los Angeles station KCBS-TV reports Karen said, "He talked to us. Tried to calm us down. And saying very frequently he would not kill us."

"He was very calm and very methodical," said Karen.

Authorities couldn't immediately verify their story, but it matched early reports from law enforcement officials. Later reports said the incident involved two women from a cleaning crew.

18 Photos

Ex-LAPD cop accused of going on killing spree

The Reynolds said they went to the cabin noon to clean it for rental purposes, and that's when they -- and not two cleaning ladies as had been reported - met up with Dorner, KCBS says.

The Reynolds say he tied their arms and put pillowcases over their heads before fleeing in their Nissan.

Karen Reynolds managed to get to her cell phone and dial 911.

The couple, who said Dorner had his gun drawn the entire time, said they were with the suspect for 15 minutes, KCBS adds. "It felt like a lot longer," said Karen. "I really thought that it was the end."

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Dorner Not IDed, But Manhunt Considered Over

Though they have not yet identified burned remains found at the scene of Tuesday's fiery, armed standoff, San Bernardino, Calif., officials consider the manhunt over for Christopher Dorner, the fugitive ex-cop accused of going on a killing spree.

"The events that occurred yesterday in the Big Bear area brought to close an extensive manhunt," San Bernardino County Sheriff John McMahon told reporters this evening.

"I cannot absolutely, positively confirm it was him," he added.

However, he noted the physical description of the suspect authorities pursued to a cabin at the standoff scene, as well as the suspect's behavior during the chase and standoff, matched Dorner, 33.

The charred remains of the body believed to be Dorner were removed from the cabin high in the San Bernardino Mountains near Big Bear, Calif., the apparent site of Dorner's last stand. Cornered inside the mountain cabin Tuesday, the suspect shot at cops, killing one deputy and wounding another, before the building was consumed by flames.

"We did not intentionally burn down that cabin to get Mr. Dorner out," McMahon said tonight, though he noted pyrotechnic canisters known as "burners" were fired into the cabin during a tear gas assault in an effort to flush out Dorner. The canisters generate high temperatures, he added.

The deputies wounded in the firefight were airlifted to a nearby hospital, where one died, police said.

Christopher Dorner Believed Dead After Shootout with Police Watch Video

Carjacking Victim Says Christopher Dorner Was Dressed for Damage Watch Video

Christopher Dorner Manhunt: Inside the Shootout Watch Video

The deceased deputy was identified tonight as Det. Jeremiah MacKay, 35, a 15-year veteran and the father of two children -- a daughter, 7, and son, 4 months old.

"Our department is grieving from this event," McMahon said. "It is a terrible deal for all of us."

The Associated Press quoted MacKay on the Dorner dragnet Tuesday, noting that he had been on patrol since 5 a.m. Saturday.

"This one you just never know if the guy's going to pop out, or where he's going to pop out," MacKay said. "We're hoping this comes to a close without more casualties. The best thing would be for him to give up."

The wounded deputy, identified as Alex Collins, was undergoing multiple surgeries for his wounds at a hospital, McMahon said, but was expected to make a full recovery.

Before the final standoff, Dorner was apparently holed up in a snow-covered cabin in the California mountains just steps from where police had set up a command post and held press conferences during a five-day manhunt.

The manhunt for Dorner, one of the biggest in recent memory, led police to follow clues across the West and into Mexico, but it ended just miles from where Dorner's trail went cold last week.

Residents of the area were relieved today that after a week of heightened police presence and fear that Dorner was likely dead.

"I'm glad no one else can get hurt and they caught him. I'm happy they caught the bad guy," said Ashley King, a waitress in the nearby town of Angelus Oaks, Calif.

Hundreds of cops scoured the mountains near Big Bear, a resort area in Southern California, since last Thursday using bloodhounds and thermal-imaging technology mounted to helicopters, in the search for Dorner. The former police officer and Navy marksman was suspected to be the person who killed a cop and cop's daughter and issued a "manifesto" declaring he was bent on revenge and pledging to kill dozens of LAPD cops and their family members.

But it now appears that Dorner never left the area, and may have hid out in an unoccupied cabin just steps from where cops had set up a command center.

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US should vaccinate poultry to stop killer salmonella

It is a case of putting the bottom line before our health. This year, a million Americans will succumb to salmonella poisoning. Several hundred will die. Yet in Europe, a cheap vaccine for chickens has slashed the number of cases. Vaccination in Iowa shows US lives can be saved too – but US rules give meat producers no incentive to use a vaccine that doesn't boost their profits.

Salmonella causes more deaths than any other food-borne germ and is the second-most common cause of food-borne illness in the US, according to a new report published by the US Centers for Disease Control and Prevention in Atlanta, Georgia. Poultry, meat and eggs are the biggest source, causing a third of all cases.

But this can be prevented. After a scandal over infected eggs in the UK in the late 1980s, farmers boosted hygiene standards and killed infected flocks. Human cases stayed high until 1998 when British supermarkets started buying eggs only from vaccinated hens, says Sarah O'Brien of the University of Liverpool, UK. Human cases then plummeted with a forty-fold drop between 1993 and 2010.

In the US, a massive recall of eggs due to salmonella in 2010 similarly led to tighter hygiene rules for chicken farms. But the US Food and Drug Administration declared there was "insufficient data on efficacy" to make vaccination compulsory, despite evidence in Europe to the contrary.

Nonetheless, as monitoring programmes have revealed just how widespread the infection is, about a third of US egg producers have started to vaccinate their chickens. That and better hygiene has reduced the number of infected hen houses fivefold in Iowa, the biggest US egg producer, in the past two years, says Darrell Trampel of Iowa State University.

Meat producers have resisted, however, even though there is salmonella on 13 per cent of chicken breasts sold in US supermarkets, says Lance Price of George Washington University in Washington DC. The farmers vaccinate for several poultry diseases, but since salmonella doesn't hurt the birds or affect their growth, says Price – and human illness is not a cost the farmers have to bear – there is no motivation to prevent its spread.

Journal reference: Emerging Infectious Disease, doi.org/kgx

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Bank of England says UK economic recovery in sight

LONDON: The Bank of England forecast on Wednesday that the British economy would experience a "slow but sustained" recovery, but 12-month inflation would top 3.0 percent in the summer months.

Gross domestic product (GDP) was expected to grow by about 2.0 percent by the end of 2014 and remain positive despite some volatility amid the ongoing eurozone crisis, the central bank said in its latest quarterly report.

"The UK economy is therefore set for a recovery," said BoE governor Mervyn King, who will be replaced by Canadian central bank boss Mark Carney in July.

"That is not to say that the road ahead will be smooth. This hasn't been a normal recession and it won't be a normal recovery.

"The bank does not expect a triple-dip recession but said GDP was likely to continue at below pre-financial crisis levels for around another two years."

The BoE report will likely ease concerns over the outlook, after a 0.3-percent contraction in the fourth quarter of 2012 left Britain on the brink of its third recession since 2008.

The bank's monetary policy committee (MPC) last week froze its key interest rate at a record-low 0.50 percent and maintained its quantitative easing cash stimulus.

In addition, last year Britain launched an £80-billion ($123.7 billion, 102 billion euros) "funding for lending" initiative -- which is aimed at providing banks with cheap funding to stimulate lending to households and businesses, and thereby boost growth.

"The MPC continues to judge that the UK economy is set for a slow but sustained recovery in both demand and effective supply, aided by a further easing in credit conditions -- supported by the bank's programme of asset purchases and the funding for lending scheme -- and some improvement in the global environment," the report said.

"But the risks are weighted to the downside, not least because of the challenges facing the euro area."

The British central bank added that household budgets would be squeezed further, with 12-month inflation set to strike 3.0 percent in the coming months and hold above its official 2.0-percent target level for another two years.

Official data had shown on Tuesday that consumer prices index (CPI) annual inflation was 2.7 percent in January for the fourth month in a row, driven partly by rebounding food and drink prices.

- AFP/al

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Police try to confirm if Dorner's body found in cabin

STORY HIGHLIGHTS

• Dorner is now accused of killing four people


• Wardens spot him driving a purple Nissan down icy roads


• He carjacks a pickup truck and barricades himself in a cabin


• A shootout ensues

Follow the story here and at CNN affiliates KCBS/KCAL, KABC, and KTLA.

Near Big Bear Lake, California (CNN) -- It may take days before authorities can officially determine whether Christopher Jordan Dorner's body was found in the ashes of a torched cabin near Big Bear Lake, California.

But several signs early Wednesday seemed to suggest that the ex-Los Angeles police officer's vendetta against his brothers in blue ended in that wooden cabin with a shootout that left one deputy dead and another wounded.

The frenzied manhunt, road blocks and helicopter flights, which had brought the mountain town to a standstill for six days, died down Tuesday night.

And late in the evening, authorities announced that they found human remains in the cabin and would need forensic experts to identify them.

Ex-cop at center of California manhunt

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But even as the question of Dorner's fate seemed close to being answered, other details eluded explanation.

The carjacking

The deputy's death in the shootout Tuesday brought to four the number of people Dorner is accused of killing.

Dorner, a man who vowed to kill police officers to avenge what he called an unfair termination, was first named a suspect in two shooting deaths on February 3: that of the daughter of his police union representative and of her fiance.

Police also say he killed one officer in Riverside, California, and wounded two others Thursday.

Authorities offered a $1 million dollar reward in the case after Dorner's burned truck was found on a forestry road near Big Bear Lake on February 7, about 100 miles east of Los Angeles.

Officers converged on the remote area but the trail went cold for days. On Sunday, the San Bernadino authorities said they had scaled back the search.

Timeline in manhunt

That all changed Tuesday, where arguably the most wanted man in America was finally spotted.

The question of where Dorner was between February 7 and Tuesday was unclear.

Wardens of the California Fish and Wildlife said they spotted Dorner driving a purple Nissan down the icy roads Tuesday. Dorner was driving very close to some school buses as if using them as cover, said Lt. Patrick Foy.

The wardens, driving in two different vehicles, chased Dorner and a gun battle ensued.

A warden's car was hit.

Dorner crashed his car, ran and then quickly carjacked a pick up truck.

Rick Heltebrake, a camp ranger, said he was driving in the area when he saw the crashed purple car -- and then something terrifying.

"Here comes this guy with a big gun and I knew who it was right away," Heltebrake told CNN affiliate KTLA. "He just came out of the snow at me with his gun at my head. He said, 'I don't want to hurt you. Just get out of the car and start walking.'"

Heltebrake said he was allowed to get his dog out of the truck before he walked away with his hands up.

"Not more than 10 seconds later, I heard a loud round of gunfire," Heltebrake said. "Ten to 20 rounds maybe. I found out later what that was all about."

The fire

Dorner fled to a nearby cabin and got into another shootout with San Bernadino County deputies, killing one and wounding another.

San Bernardino County Sheriff John McMahon told reporters Tuesday the other deputy was in surgery "but he should be fine,"

The cabin caught fire after police tossed smoke devices inside, a law enforcement source told CNN.

The intense fire burned for hours as authorities waited at a distance.

Despite the enormity of the blaze, authorities were hesitant to officially say they had stopped Dorner.

"No body has been pulled out," LAPD Cmdr. Andrew Smith said at a news conference Tuesday night. "No reports of a body being ID'd are true."

Cindy Bachman, a spokeswoman for the lead agency in the case -- the San Bernardino Sheriff's Department -- echoed the words, saying at a separate news conference that authorities believe whoever was in the cabin never left.

"They believe that there is a body in there, but it is not safe to go inside," she told reporters.

Finally, late Tuesday night, sheriff's investigators said they found charred human remains within the ashes of the torched cabin.

The department said it will work to identify the remains -- but it could take a while.

The security

Clues to the targets of the violence were mentioned in Dorner's fiery manifesto that was posted online. Authorities say Dorner began making good on his threats on February 3 when he allegedly killed Monica Quan and Keith Lawrence in an Irvine parking lot, south of Los Angeles.

According to the manifesto, Randal Quan, Monica Quan's father, bungled Dorner's LAPD termination appeal.

Randal Quan represented Dorner during the disciplinary hearing that resulted in his firing. The officer was among dozens named in the manifesto.

On February 7, Dorner allegedly opened fire on two LAPD police officers, wounding one, in the suburban city of Corona.

Roughly 20 minutes later, Dorner allegedly fired on two officers in the nearby city of Riverside, killing Officer Michael Crain and wounding another.

Since then, the LAPD has provided security and surveillance details for more than 50 police officers and their families -- many of whom were named in the manifesto.

Police said Tuesday night they would continue to protect the people Dorner said he would target until it was confirmed that he died in the cabin.

In the manifesto Dorner wrote about death multiple times. Not just the death of his targets but of his own.

"Self Preservation is no longer important to me," the manifesto said at one point. "I do not fear death as I died long ago."

CNN's Miguel Marquez reported from near Big Bear Lake and Lateef Mungin wrote from Atlanta. CNN's Paul Vercammen, Stan Wilson, Casey Wian, Kathleen Johnston, Alan Duke, Matt Smith, Chelsea J. Carter, Michael Martinez and Holly Yan also contributed to this report.

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Not surprisingly, House GOP pans State of the Union

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Obama: Both parties know sequester cuts "a really bad idea"

It shouldn't come as a shock that congressional Republicans weren't very impressed by President Obama's State of the Union address. 

For his part, the president didn't hide his suggestion that it's Republicans who are resistant to compromise, leading some Republicans to jab the president, particularly regarding his lack of clarity on how he would replace the so-called sequester cuts set to slash defense and domestic spending on March 1.

"What has he done?" asked Rep. Cory Gardner, R-Colo. "He signed the sequester, he agreed to the sequester, he came up with the sequester and then he complains about House solutions to actually try to deal with it. This president is more interested in campaign-style rhetoric than actual solutions."

While many said there is some room to work with Mr. Obama on issues like immigration, and even some gun safety measures, his new proposals on everything from education to repairing the nation's crumbling bridges were panned not necessarily based on merit, but on the president's claim that the new programs would not increase the deficit "by a single dime."

"I think it doesn't pass the laugh test" said the chairman of the conservative House Republican Study group Rep. Steve Scalise, R-La. "People realize the President promised to cut the deficit in half and it's more than doubled."

"It's economic fairy dust that this President's working with," added Gardner.

On the president's call to address climate change and become more energy independent, Rep. Lee Terry, R-Neb., called the president's silence on giving the green light to construct the Keystone XL pipeline to pump oil from Canada to the Gulf of Mexico "deafening."

Chairman of the House Energy and Commerce Committee Fred Upton, R-Mich., also said "With a stroke of the pen, the president could unleash this $7 billion private sector investment. Yet nowhere in this evening's blueprint for the president's policy vision was this critical middle-class jobs project."

Rep. Raul Labrador, R-Idaho, who is expected to be a key House Republican player in immigration talks as a Hispanic-American from a conservative state, said the president's State of the Union this year was "one of the least inspiring speeches I ever heard him give."

But Labrador said he does think Republicans and Democrats will ultimately be able to come together on an overhaul of the nation's immigration system.

"As long as the president and his party don't draw a red line and say that they have to get everything that they want."

Labrador was less optimistic about gun control. He compared his home state of Idaho with low crime and few gun regulations to Mr. Obama's home state of Illinois as an example of why gun laws aren't necessarily effective.

"It has the most stringent gun control legislation and it has some of the highest crime in the United States" Labrador said of Illinois. "Clearly gun control is not going to protect those families."

And while Labrador said he believes the president cares about the victims of gun violence and their families that attended the speech, he said they should not be used as "political pawns."

Labrador said, however, that as a father of five children he was so upset by the Sandy Hook Elementary School massacre that he could not speak of the shooting for two days. He said "if there's things that we can do to save lives without violating the second amendment I think we should consider it."

Democrats gave the speech high marks. In a statement, Minority Leader Nancy Pelosi, D-Calif., said she urged the two parties to work together and said "it is time to heed the President's call for real progress to reverse the rising tide of climate change, enact comprehensive immigration reform, and prevent gun violence."

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Charred Human Remains Found in Burned Cabin

Investigators have located charred human remains in the burned out cabin where they believe suspected cop killer and ex-LAPD officer Christopher Dorner was holed up as the structure burned to the ground, police said.

The human remains were found within the debris of the burned cabin and identification will be attempted through forensic means, the San Bernardino County Sheriff-Coroner Department said in a press release early this morning.

Dorner barricaded himself in the cabin in the San Bernardino Mountains near Big Bear Tuesday afternoon after engaging in a gunfight with police, killing one officer and injuring another, the San Bernardino County Sheriff's Department said.

Cindy Bachman, spokeswoman for the San Bernardino County Sheriff's Department, which is the lead agency in the action, said Tuesday night investigators would remain at the site all night.

FULL COVERAGE: Christopher Dorner Manhunt

When Bachman was asked if police thought Dorner was in still in the burning cabin, she said, "Right… We believe that the person that barricaded himself inside the cabin engaged in gunfire with our deputies and other law enforcement officers is still inside there, even though the building burned."

Bachman spoke shortly after the Los Angeles Police Department denied earlier reports that a body was found in the cabin, contradicting what law enforcement sources told ABC News and other news organizations.

Christopher Dorner Manhunt: Police Exchange Fire With Possible Suspect Watch Video

Fugitive Ex-Cop Believed Barricaded in Cabin, California Cops Say Watch Video

Police around the cabin told ABC News they saw Dorner enter but never leave the building as it was consumed by flames, creating a billowing column of black smoke seen for miles.

A press conference is scheduled for later today in San Bernardino.

One sheriff's deputy was killed in a shootout with Dorner earlier Tuesday afternoon, believed to be his fourth and victim after killing an LAPD officer and two other people this month, including the daughter of a former police captain, and promising to kill many more in an online manifesto.

PHOTOS: Former LAPD Officer Suspected in Shootings

Cops said they heard a single gunshot go off from inside the cabin just as they began to see smoke and fire. Later they heard the sound of more gunshots, the sound of ammunition being ignited by the heat of the blaze, law enforcement officials said.

Police did not enter the building, but exchanged fire with Dorner and shot tear gas into the building.

One of the largest dragnets in recent history, which led police to follow clues across the West and into Mexico, apparently ended just miles from where Dorner's trail went cold last week.

Police got a break at 12:20 p.m. PT, when they received a 911 call that a suspect resembling Dorner had broken into a home in the Big Bear area, taken two hostages and stolen a car.

The two hostages, who were tied up by Dorner but later escaped, were evaluated by paramedics and were determined to be uninjured.

Officials say Dorner crashed the stolen vehicle and fled on foot to the cabin where he barricaded himself and exchanged fire with deputies from the San Bernardino Sheriff's Office and state Fish and Game officers.

Two deputies were wounded in the firefight and airlifted to a nearby hospital, where one died, police said. The second deputy was in surgery and was expected to survive, police said.

Police sealed all the roads into the area, preventing cars from entering the area and searching all of those on the way out. Are schools were briefly placed on lockdown.

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