Latest on the Boston bombings:
(WATERTOWN, Mass.) — The post bombing atmosphere in Boston had taken a nasty turn on Thursday, as a police official was shot dead shortly after it was reported that one of the major suspects in the Boston marathon bombings had been killed in a police encounter. The police swamped many buildings of the Massachusetts Institute of Technology (MIT) where their colleague was shot at and have advised students and members of the local community to stay indoors and avoid the university campuses.
Hours later, MIT, which has about 11,000 students, said the campus was clear but the shooter was still on the loose.