Department-store surveillance video captured a man dropping off a bag at the site of the Boston Marathon bombings.

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Investigators are working to identify a person in a video who appeared to leave a bag where one of two bombs exploded at the Boston Marathon.

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City Council President Stephen Murphy, who said he was briefed by Boston police, said investigators saw the image of the man dropping off a bag and matched the findings with witness descriptions of someone leaving the scene.

NPR: Image Leads To Hunt For Boston Bombing Suspect