Gunfire, explosions and 1 arrest as manhunt of MIT killer continues

One suspect is dead, 2nd suspect still at large, reports WHDH TV. Residents of Watertown being told to roll up windows, lock doors and stay inside while one suspect still at large.

Police gather in Watertown, near Boston, amid reports of shooting and explosives.

MIT Emergency website currently indicates that suspect is no longer on campus, and “it is now safe to resume normal activities.” One suspect has been taken to hospital, The Boston Channel reported.

Gunfire and explosions erupted in streets close to the prestigious Massachusetts Institute of Technology on Friday after a police officer was shot dead there, witnesses said. Local media said one person may have been shot in the incidents as heavily armed police launched a major manhunt following the killing on the MIT campus near the US city of Boston.

The explosions and gunfire were heard in the Watertown district north of the university. "There were blasts, it could have been grenades," said local resident Adam Brown.

The NBC channel later showed film of a man lying on the ground in a street in the town and surrounded by police.

Two hours earlier, a gunman shot dead an MIT campus policeman.MIT is in Cambridge, Massachusetts, just across the Charles River from Boston, where three people were killed and 180 injured in a double bomb attack on the city's marathon on Monday.