Massive volley of gunfire -- 15 or 20 seconds at least
Tremendous amount of police activity
Everyone is running toward an empty parking lot -- media told to head toward Franklin Street
A boat in a backyard in Watertown that they wanted to search. Told us to take shelter. State Police waved us off.
State Police officer saying man has a rifle
Channel 5 is reporting a body found in a boat in a Watertown backyard.
State police were planning to surround the boat to secure it .. that's when we heard the gunfire -- Channel 5.
Dozens and dozens of police rushing to the scene.
Heard the pop of gas canisters - Channel 5
This happened rapidly -- police hadn't even set up operation they planned to - Channel 5
WBZ-TV is reporting gunshots fired in Watertown.
We don't know who fired first -- blood on the boat and a live person inside the boat
There was an exchange of gunfire - a couple dozen rounds.
Until you hear otherwise, get ready to get behind something solid, police told Channel 5 reporters. Appear to be evacuating some residents in the area.
People are staying in their houses - Channel 5
Three ambulances were on the way to the scene.
Three swat vehicles have driven to the scene.
Channel 5 says there is somebody in a boat in the Watertown backyard, but they do not know if he is dead or alive.
Police are lined up, down on one knee, peering through bushes and tree leaves. Not clear if the person in the boat has been killed. Even if he has, police are concerned that his body could be booby-trapped.
A Globe source says the person in the boat is not moving.
The boat is in the backyard of 67 Franklin St. in Watertown. Franklin is a 45-degree angle street; it runs from Mount Auburn Street to Walnut Street. This house is located close to the curve in the street.
Police have removed the cover from a boat in a Watertown backyard containing the man believed to be the Boston Marathon terror bombing suspect, a source tells the Globe. Police believe they have located and pinned down the desperate 19-year-old man, a separate source told the Globe.
WBZ is reporting that police found the man in the boat using thermal imaging.
BREAKING NEWS: Police are still concerned that the suspect may be wearing a suicide bomb vest, the source tells the Globe.
NBC News is reporting that there was a small fire in the boat the bombing suspect is hiding in and that the suspect is bleeding heavily.
Police still are treating the scene cautiously.
Police arrested three college-age suspects in New Bedford related to the bombing investigation, according to the Globe.