Tense Photos Show the Boston Bomber Manhunt and Town on Lockdown

First suburbs and now the city of Boston have been put on lockdown with police asking residents to stay inside as one suspect in the Boston bombing remains at large.

Thursday night, another of the suspects was killed in Watertown, Massachusetts, after stealing a car at gunpoint. Prior to the theft, the men are suspected of killing a Massachusetts Institute of Technology police officer on campus in Cambridge.

Get live updates on the manhunt for the terror suspect here.

Here's a look at the man hunt and the lockdown so far:

• FBI Release Higher Quality, ‘Up Close’ Images of Boston Marathon Suspects
• Police Put Boston Suburbs on Lockdown, Public Transit and Business Shut Down as Massive Manhunt for Alleged Bomber Continues
• Officials: 1 Boston Bombing Suspect Killed in Shootout in Watertown, Mass., Massive Manhunt Underway for Second
• NBC: Boston Terror Suspects Have International Ties and Have Been in U.S. Legally for About a Year