Investigators have now cleared the two men whose pictures were circulated last night in an email among law enforcement officials, sources told The Post today.

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.

Authorities have not decided whether to publicly release any photos today.

Sources said the investigation could be a prolonged effort.

“It’s not like we’re going to have somebody in cuffs in five minutes but it is evolving,” said a federal law enforcement source.