BOSTON (AP) -- A politician says investigators poring over photos and videos from the Boston Marathon bombing have an image of a man dropping off a bag containing one of the bombs.
City Council President Stephen Murphy said Wednesday investigators saw the image on surveillance footage they got from a nearby department store. He says he doesn't know if investigators have identified the man.
Murphy says police officers involved in the probe say investigators have matched information from the surveillance footage with witness descriptions of someone leaving the scene.
Murphy says officers are chasing leads that could take them to the man. He says developing that information within the first 48 hours of the probe is a major breakthrough.
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