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Hunt for the Boston Marathon suspectsA deadly chase through the Boston suburbs early Friday led to the death of one of the suspects in the April 15 bombing at the Boston Marathon. A campus police officer was also killed, and the other suspect is on the run. What happened so far:

5:10 p.m. Investigators release photos, video of the two suspects

Around 10 p.m. Two men rob a 7/11 in Cambridge, Mass.; security camera catches a man identified as one of the suspects

10:30 p.m. MIT campus police officer who was responding to a disturbance is found shot in his cruiser, apparently by the suspects; officer later pronounced dead

Short time later Two armed men reportedly carjack a Mercedes SUV in Cambridge; they hold a man who was in the vehicle for about a half hour; release him unharmed

Police pursue carjacked vehicle to Watertown, Mass.; explosive devices are thrown from the vehicle, and carjackers and police exchange fire; transit police officer seriously wounded, and one suspect, later identified as Suspect No. 1, is injured and later pronounced dead

Police begin manhunt for Suspect No. 2

Thursday, April 18

Friday, April 19Around 1 a.m. Gunshots, explosions heard in Watertown; police and FBI converge on town, helicopter circles overhead4:30 a.m. Watertown residents told to stay in their homes; carjackers identified as bombing suspects

Suspect No. 1 (dead)

Suspect No. 2

Tamerlan Tsarnaev, 26Born in Russia; family appears to have immigrated from Chechnya; became a legal U.S. resident in 2007

Dzhokhar Tsarnaev, 19Born in Kyrgyzstan; younger brother of Tamerlan; on the run; considered armed and dangerous

© 2013 MCTSource: AP, Reuters, New York Times, BBC, Daily Mail, MCT Photo Service

Graphic: Pat Carr, Melina Yingling, Tim Goheen, Judy Treible

BOSTON

CAMBRIDGEWATERTOWN Cambridge St.

Main St.

Charles River

Western Ave.

River St.

Boylston St.

Beacon St.

Arsenal St.

Two bombs at Boston Marathon kill three and injure more than 100