Watertown

SWAT teams enter a suburban neighborhood to search an apartment for the remaining suspect in the Boston Marathon bombings in Watertown, Massachusetts April 19, 2013. Police killed one suspect in the Boston Marathon bombing during a shootout and were engaged in a house-to-house search for a second man on Friday in the Boston suburb of Watertown after a bloody night of shooting and explosions in the city's streets.

Jessica Rinaldi/Reuters

SWAT teams enter a suburban neighbourhood in the suburb of Watertown, Massachusetts to search an apartment for the remaining suspect in the Boston Marathon bombings. Police killed one suspect during a shoot-out and were engaged in a house-to-house search for a second man on Friday after a night of shooting and explosions in the city’s streets.

WATERTOWN, MA - APRIL 19:  Police with guns drawn search for a suspect on April 19, 2013 in Watertown, Massachusetts. Earlier, a Massachusetts Institute of Technology campus police officer was shot and killed late Thursday night at the school's campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. It's not clear whether the shootings are related or whether either are related to the Boston Marathon bombing.

Mario Tama/Getty

Police with guns drawn on Friday search for a suspect in Watertown, Massachusetts. A Massachusetts Institute of Technology campus police officer was shot and killed late on Thursday night at the school’s campus in Cambridge. A short time later, police reported exchanging gunfire with alleged carjackers in Watertown, a city near Cambridge. Read more