A policeman works at the blast site in Boston, the United States, April 17, 2013. U.S. investigators believed that they have identified a suspect for Monday's Boston Marathon bombings, which killed three people and injured over 170 others, U.S. media reported on Wednesday. (Xinhua/Wang Lei)
Policemen work at the blast site in Boston, the United States, April 17, 2013. U.S. investigators believed that they have identified a suspect for Monday's Boston Marathon bombings, which killed three people and injured over 170 others, U.S. media reported on Wednesday. (Xinhua/Wang Lei)
Policemen work at the blast site in Boston, the United States, April 17, 2013. U.S. investigators believed that they have identified a suspect for Monday's Boston Marathon bombings, which killed three people and injured over 170 others, U.S. media reported on Wednesday. (Xinhua/Wang Lei)
FBI personnel work at the blast site in Boston, the United States, April 17, 2013. U.S. investigators believed that they have identified a suspect for Monday's Boston Marathon bombings, which killed three people and injured over 170 others, U.S. media reported on Wednesday. (Xinhua/Wang Lei)
Policemen work at the blast site in Boston, the United States, April 17, 2013. U.S. investigators believed that they have identified a suspect for Monday's Boston Marathon bombings, which killed three people and injured over 170 others, U.S. media reported on Wednesday. (Xinhua/Wang Lei)
Policemen work at the blast site in Boston, the United States, April 17, 2013. U.S. investigators believed that they have identified a suspect for Monday's Boston Marathon bombings, which killed three people and injured over 170 others, U.S. media reported on Wednesday. (Xinhua/Wang Lei)
