CAMBRIDGE, MA (NEWS1130) - Police say one of two suspects in the shooting of a Massachusetts Institute of Technology police officer is dead and a massive manhunt is underway for another, who is believed to be tied to the Boston Marathon bombing.

Shortly after the MIT officer was shot dead Thursday night, police got a report of a carjacking in Cambridge, just outside Boston. One of the two suspects in that officer’s shooting died in hospital after a shootout with police.

Police say of the at-large suspect, “We believe this to be a terrorist.”

The MIT shooting on the Cambridge campus Thursday night was followed by reports of violence in nearby Watertown, about 16 kilometres west of Boston.

State police spokesman David Procopio had said there was a “strong possibility” the incidents are related.

The MIT officer was responding to report of a disturbance Thursday night when he was shot multiple times, according to a statement from the Middlesex district attorney’s office and Cambridge police.

It said there were no other victims.