One Boston Marathon suspect is dead and another at large, following last night's deadly shooting at MIT. Beth Israel hospital officials say the dead suspect -- seen in FBI photos with a dark hat and sunglasses -- died from a combination of blast injuries and countless gunshot wounds. The pair are believed to have gunned down an MIT police officer as he sat in his cruiser. They then carjacked an SUV and fled to Watertown. Police say the pair were throwing explosive devices at officers during that car chase.
Police are going door-to-door in the Watertown area just outside of Boston in hopes of closing the investigation. At officials' request, the MBTA has shut down until further notice. Police are warning Watertown residents to stay in their homes, and not to open the door for anyone except police officers. A pressure cooker and other undetonated devices have reportedly been found scattered throughout Watertown.
NBC News says the suspects have international ties, and have been in the U.S. legally for around a year. Boston Police Commissioner Ed Davis says suspect number two is a "terrorist who came here to kill people." At least three people were killed at the Boston Marathon Monday, and over 170 were wounded.