Authorities determined neither had any information or role in Monday’s attacks at the Boston Marathon. The pictures, which were distributed yesterday evening in an attempt to identify them, show the two men standing with a backpack and duffel bag near the finish line, where a pair of bombs killed three and maimed 176. Meanwhile, sources said today that the feds have an image from a store video camera of a person of interest. They also have an image of a potential witness that was captured on film, though that person is not considered a suspect, the sources said.