BOSTON - The FBI is on the hunt for those responsible for Monday's bombings at the Boston Marathon.

Authorities last night raided the apartment of a possible suspect in Revere, Mass., where they seized several bags of evidence. However, they have since announced that the materials are not linked to the blasts.

Agents also say there were no unexploded devices found along the marathon route. Meanwhile, officials are diligently reviewing surveillance and witness video as part of the investigation.