— BOSTON (AP) — Investigators poring over photos and video from the Boston Marathon bombing have a department-store surveillance-camera image of a man dropping off a bag at the scene of the one of the blasts, a top city politician said Wednesday.
City Council President Stephen Murphy, who said he was briefed by members of the Boston Police Department, said he does not know if investigators know the man's name. He said officers are chasing leads that could take them to the suspect.
"They may be on the verge of arresting someone and that's good," he said.
Separately, a law enforcement official who spoke to The Associated Press on condition of anonymity and was not authorized to discuss the case publicly confirmed only that investigators had an image of a potential suspect but did not know his identity.
The twin bomb blasts Monday near the finish line of the world's most famous foot race killed three people and wounded more than 170, tearing off limbs in a hail of shrapnel.
Law enforcement agencies pleaded for the public to come forward with photos, videos or any information that might help them solve the case, and they gathered surveillance video from businesses around the finish line.
The bombs are believed to have been fashioned out of ordinary kitchen pressure cookers packed with explosives, nails, ball bearings and metal shards designed to maim. Investigators suspect the bombs were hidden in black duffel bags and left on the ground.
As a result, they were looking for images of someone lugging a dark, heavy bag.
"One of the department stores down on Boylston Street submitted video system which has confirmed that a suspect is seen dropping a bag near the point of the second explosion and heading off," Murphy said.