LATEST: Gunfire heard in Boston suburb, police operation focuses on property

The sound of gunfire has been reported in Watertown, Massachusetts, where authorities have been searching for a suspect in the Boston Marathon bombings.

Television footage is showing emergency and military vehicles speeding through town Friday evening.

The police operation is focused on a property at 67 Frankin St, local news channel WCVB reported.

The scene pic.twitter.com/p3l9t5tcw9

— Erin Ailworth (@ailworth) April 19, 2013

It wasn't immediately clear whether authorities had found 19-year-old college student Dzhokar Tsarnaev.

Authorities are telling residents of the area to stay indoors.

Heavy police presence in area of Franklin St in Watertown. Residents remain inside.

— Boston Police Dept. (@bostonpolice) April 19, 2013

Reports that the suspect has been surrounded have not been confirmed by officials at this point.

BREAKING NEWS: Residents describe pandemonium on Franklin Street in Watertown; source says suspect pinned down.

— The Boston Globe (@BostonGlobe) April 19, 2013

LATEST:

Marathon bombings suspect believed to be inside boat in back yard of Watertown home. The boat was surrounded by police.

— The Boston Globe (@BostonGlobe) April 19, 2013

No confirmation yet if it was the suspect linked to marathon bombings. Shots fired. Scene calm now. Area secure. No stretchers.

— Sean Kelly (@SeanKellyTV) April 19, 2013

BREAKING NEWS: Police have taken the cover off the boat containing the man believed to be the Marathon bombing suspect. He's not moving.

— The Boston Globe (@BostonGlobe) April 19, 2013

BREAKING NEWS: Police believe bombing suspect still alive on boat; have seen him moving from State Police helicopter.

— The Boston Globe (@BostonGlobe) April 19, 2013

BREAKING NEWS: Police are using 'flash bangs' to disorient and distract the suspect. They have seen him sit up.

— The Boston Globe (@BostonGlobe) April 19, 2013

BREAKING NEWS: Police are still concerned that the suspect may be wearing a suicide bomb vest, the source tells the Globe.

— The Boston Globe (@BostonGlobe) April 19, 2013