During a press conference Thursday afternoon (Apr. 18), the FBI identified two suspects in the Boston Marathon Bombing case. Photos and videos were revealed and the FBI asked for the public's help in identifying these two men.

The suspects, one of whom wore a a dark ballcap and the other who wore backwards white ballcap, appear to be in their twenties and were captured on footage near where one of two explosions killed three and injured 176. In video that appears to be from a surveillance camera and which was shown by the FBI, both suspects are walking west on Boylston Street, near the finish line and where the explosions occurred.

"The nation is counting on those with info to come forward," he added, urging anyone who recognizes the men to call 1-800-CALL-FBI or head to a special tip site created for the bureau's investigation: www.bostonmarathontips.fbi.gov.