US 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 officer was shot dead last night, police got a report of a carjacking in Cambridge, just outside Boston.
One of the two suspects in the shooting was killed.
The MIT shooting on the Cambridge campus was followed by reports of violence in nearby Watertown, about 10 miles west of Boston.
Police say there is a "strong possibility" that the incidents are related.
Picture: Dzhokar Tsarnaen