Terrorist act in Boston: U.S. police look for black man

A man tried to enter the top security area a few minutes before the explosion, witnesses say, RBK reports referring to CNN.

A man had a distinct accent. He was wearing a dark sweater and had a black backpack. Nobody has seen him after the blast.

The police have interrogated a Saudi Arabian injured in the explosion. But he is not a suspect, the police stress.

Two bombs exploded at the finish line of the world famous marathon in Boston. One more bomb went off in the library and two blasting assemblies were found in other districts of the city later.

Photo: Boston Globe Sports