Federal Authorities Release Photos of Bomb Device

Courtesy of the Associated Press

An intelligence bulletin issued to law enforcement and released late Tuesday includes a picture of a mangled pressure cooker and a torn black bag the FBI said were part of a bomb used Monday at the Boston Marathon.

The FBI and other law enforcement agencies have repeatedly pleaded for members of the public to come forward with photos, videos or anything suspicious they might have seen or heard.

Federal authorities say the person or persons responsible for the attack likely used ordinary pressure cookers packed with shrapnel such as nails, metal shards or ball bearings. Both devices were left on the ground in bags or backpacks made of nylon.

Three people were killed and more than 180 injured.13 of the injured had limbs amputated.

Officials say information on how to make such bombs is readily found online.

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