Destabilization and terror in Boston and the U.S. after shooting in Watertown and MIT in Cambridge, near Boston.
Local media reported explosions and gunfire in Watertown, near Boston. It is said to have been discovered unexploded devices.
Police urged residents of the city of Watertown, near Boston, to go out of their homes.
Has not reported any connection with shooting in Cambridge near Boston.
Policeman was shot last night on the campus of MIT in Cambridge near Boston, local authorities and media.
The campus is a few miles from downtown Boston, where on Monday, two bombs exploded near the finish line of the local marathon, killing three and wounding over 170 people.
In the website of the university said that the situation was "extremely dangerous" and urged students not to leave the premises. Building campus is surrounded by the police.
The officer in charge of the security of the campus responded to a call for disorderly conduct, and was shot several times. He later died in hospital.
Explosions were there this morning in the streets around the campus during the search for a cop killer, there are probably others wounded.