WHDH, the NBC affiliate in Boston, showed photos of what may be the second bomb that went off near the finish line of the Boston Marathon on Monday. The first photo shows what looks like a bag or a box on the street side of the metal barricade. The second photo shows the same area shortly after the explosion, clearly more affected than other areas. Both photos have been forwarded to the FBI.

Officials have also released photos showing fragments discovered so far of the bombs used in the attack. (See them here.)