Police officers aim their weapons Friday, April 19, 2013, in Watertown, Mass. A tense night of police activity that left a university officer dead on campus just days after the Boston Marathon bombings and amid a hunt for two suspects caused officers to converge on a neighborhood outside Boston, where residents heard gunfire and explosions.(AP Photo/Matt Rourke)
Gallery: Police converge on suspects in Boston
Apr. 19, 2013 @ 09:03 AM
Boston authorities suspended all mass transit and urged people to stay indoors Friday as they searched for the second of two suspects in the Boston Marathon boming Monday. The first suspect was killed in a shootout overnight.