Suspect is on a boat in a residential backyard. Now many more gunshots and loud bangs.
4:56 PM PT (Meteor Blades):
"He's hit", says @PeteWilliamsNBC, citing sources, "and they believe he's been there much of the day" @NBCNews
— @carlquintanilla via web
4:57 PM PT (Meteor Blades): No further movement. Helicopter has departed.
5:01 PM PT (Meteor Blades):
5:15 PM PT (Meteor Blades):
BREAKING NEWS: Police are still concerned that the suspect may be wearing a suicide bomb vest, the source tells the Globe.
— @BostonGlobe via HootSuite