Aram Boghosian for The Boston Globe
SWAT teams moved into position in Watertown Friday morning during a massive manhunt for one of the Marathon bombing suspects.
FBI, BRIC/AP
Authorities are searching for Dzhokhar Tsarnaev, the suspect seen in FBI photos in a white cap.
Matt Rourke/AP
Police evacuated a neighborhood in Watertown Friday as they hunted for one of the Marathon bombing suspects.
Jonathan Wiggs/Globe Staff
Streets in Cambridge were nearly empty amid the manhunt.
Essdras M. Suarez/Globe Staff
Governor Patrick addressed members of the media during a press conference at the Watertown Mall.
Jonathan Wiggs/Globe Staff
A MIT police officer stood by his cruiser Friday. Late Thursday, a MIT officer Sean Collier was shot and killed.
FBI/AP
The man known as the "white hat" suspect, seen here in FBI photos released from the Marathon at left, is still at large. He is being identified as 19-year-old Dzhokhar A. Tsarnaev from Russia. The "black hat" suspect - his brother on the right - died in a shoot-out with the police.
Bill Greene/Globe Staff
Police searched for a suspect in Watertown early Friday.
Aram Boghosian for the boston globe
Teams moved into position in Watertown while searching for the Marathon bombing suspect who was still at large.
David L. Ryan/ Globe Staff
Vehicles were not allowed in or out of Watertown.
David L. Ryan/ Globe Staff
A convenience store at Memorial Drive and River Street in Cambridge became a crime scene after two men carjacked an SUV at gunpoint.
Aram Boghosian for The Boston Globe
The events began with a reported shooting at the intersection of Vassar Street and Main Street in Cambridge.
Residents told to stay inside as hunt continues
Bombing suspects were local, 'normal' US immigrants
