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BOSTON - A timeline of events in the manhunt for the two Boston Marathon bombing suspects:
--At 5:10 p.m. Thursday, investigators of the bombings release photographs and video of two suspects. They ask for the public's help in identifying the men.
-- Around 10:20 p.m., shots are fired on the campus of the Massachusetts Institute of Technology in Cambridge, just outside Boston.
--At 10:30 p.m., an MIT campus police officer who was responding to a disturbance is found shot multiple times in his vehicle, apparently in a confrontation with the Boston Marathon bombing suspects. He is later pronounced dead.
Video claiming to be of the firefight was posted to YouTube. You can watch it below or at http://www.youtube.com/watch?v=wSlRHJv1nnA&feature=youtu.be.
--Shortly afterward, two armed men reportedly carjack a Mercedes SUV in Cambridge. A man who was in the vehicle is held for about a half hour and then released unharmed at a gas station on Memorial Drive in Cambridge.
--MIT officials say police swept the Cambridge campus at about 10:30 p.m. Thursday and urged people to stay indoors. Emerson College was also placed on lockdown.
--Shortly thereafter, police sent a large force into the Watertown community and ordered vehicles off the streets. Public transit in the area was shut down and residents were asked to remain in their homes. At least a quarter of a million people live in the suburbs of Watertown, Newton, Arlington, Waltham, Belmont, Cambridge and Allston-Brighton. All modes of public transportation were shut down, including buses, subways, trolleys, commuter rail and boats, said Joe Pesaturo, spokesman for the Massachusetts Bay-- Transportation Authority.
--Some kind of explosive devices are thrown from the vehicle in an apparent attempt to stop police. The carjackers and police exchange gunfire. A transit police officer is seriously injured. One suspect, later identified as Suspect No. 1 in the marathon bombings, is critically injured and later pronounced dead.
--Watertown residents reported hearing explosions and gunshots at about 1 a.m. Friday. Neighbors said they could see a helicopter overhead and dozens of police officers and FBI agents swarming the neighborhood.
--According to the AP, residents said they were told by police to stay indoors at about 1:30 a.m. because there were "undetonated explosives" in the streets.
--By about 4:30 a.m., officials said one of the suspects had died at a hospital. Doctors at a Boston hospital later said they treated a man with apparent blast injuries and multiple gunshot wounds. Also, Massachusetts state and Boston police hold a short outdoor news briefing. They tell people living in that section of eastern Watertown to stay in their homes. They identify the carjackers as the same men suspected in the marathon bombings. Overnight, police also release a photograph of a man believed to be Suspect No. 2, apparently taken from store video earlier in the evening at a 7-Eleven convenience store in Cambridge. He is wearing a grey hoodie-style sweatshirt.
--The AP reported that police released the name of the surviving suspect early Friday morning. According to the AP report, the suspect was identified as Dzhokhar A. Tsarnaev, 19, of Cambridge, Mass.
-- Reports indicate that the suspects are from a Russian region near Chechnya. Two law enforcement officials told AP that Tsarnaev and the other suspect -- who was not immediately identified -- have been living legally in the U.S. for at least one year. Russia's North Caucasus region has been plagued by an Islamic insurgency stemming from separatist wars in Chechnya.
--Officials report that President Barack Obama has been briefed on the Watertown situation.
--Boston officials have extended the order to "stay inside" to all of Boston. Gov. Deval Patrick has asked people to only respond to police with proper ID.
--According to the Associated Press, the second suspect is Russian-born 26-year-old Tamerlan Tsarnaev, brother of Dzhokhar.
--At about 8:40 a.m., a U.S. law enforcement official and the uncle of the suspects confirm that the name of the slain suspect is Tamerlan Tsarnaev, Dzhokhar Tsarnaev's older brother.
--About 9 a.m., Father of Boston bombing suspect says son is accomplished medical student and "a true angel."
--9:45 a.m., Mass transit in and out of Boston has all but ended. The trains, buses and taxis have shut down but air travel is still being allowed. However, getting to Logan Airport could be an issue. Some airlines are already allowing travelers to change their tickets for free.
--10:18 a.m., ABC News reports that the FBI has quickly placed wanted digital billboards throughout the city for Dzhokar Tsarnaev
--11 a.m., Sec. of State John Kerry spoke to the media saying 'We are part of the way there' in bringing the Boston terror suspects to justice."
11:56 a.m., Massachusetts State Police say the Tsarnaev brothers likely spent the night in a Honda CRV and later used it in a carjacking. Investigators say one brother drove away in the CRV, the other in a Mercedes SUV. The Mercedes was later ditched and the brothers reunited before leading police on a chase that resulted in the death of Tamerlan Tsarnaev. The CRV was recovered in Boston.
--12 p.m., the uncle of the two suspects spoke to the press calling his nephews "losers" and urging them to turn themselves in
--12:34 p.m., Gov. Patrick again asks residents to stay indoors while police continue their investigation. Police commanders say officers are still doing a street-by-street search. Agents also preparing to complete a controlled detonation of unexploded ordinance that was found after the chase. Officials say even after the incident is resolved it could take time to release the scenes as crews have to process the evidence in multiple locations.
--12:44 p.m., According to the AP, a senior Democrat on the House Intelligence Committee says the two Boston Marathon bombing suspects had collected pipe bombs, grenades and improvised explosive devices before they confronted police. Rep. Dutch Ruppersberger said that the brother who fled after the early-morning gunfight threw some of the devices at police as he drove away. The Maryland Democrat said, "They clearly amassed a small arsenal of explosives."
Ruppersberger, who was briefed by authorities, said U.S. law enforcement and intelligence officials plan to quickly pivot from their search for the surviving suspect to learn whether the brothers had any help or contact from terrorist groups inside or outside the U.S. Ruppersberger said authorities likely will ask Russian officials for evidence in Chechnya and other nearby Russian regions.
--2:45 p.m., A government source reveals that Tamerlan Tsarnaev, the deceased suspect, had traveled to Russia for six months last year.
--4 p.m., Both the father and the aunt of the suspects have come out in support of them, claiming they were set up.
- Around 6:30 p.m., Massachusetts Gov. Patrick Deval announces that mass transit is resuming and the "stay indoors" order is being lifted even though one suspect remains on the lam. State police say that suspect, Dzhokhar Tsarnaev, fled on foot and there is indication he has a vehicle. They believe he is still in the state because of his ties to the area.
-Around the time the order is lifted, a flurry of gunfire breaks out in the same community that was being searched. Law enforcement officials locate Dzhokhar Tsarnaev in a boat parked behind a home.
- Dzhokhar Tsarnaev is taken into custody by police at approximately 8:45 p.m. Spontaneous applause breaks out among police and onlookers surrounding the scene and residents take to the streets to cheer police.
View an interactive timeline of the hunt on your mobile device: http://ch7ne.ws/15rilKW
Copyright Copyright AP Modified, Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.
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