New details emerge on bombs used in Boston Marathon attack

New details emerge on bombs used in Boston Marathon attack

April 16, 2013 Updated Apr 16, 2013 at 12:37 PM EST

(CBS News) Police and federal agents appealed to the public Tuesday for amateur video and photos that might yield clues to the Boston Marathon bombing and one of the explosive devices appears to have been placed in a metal pressure cooker packed with nails and ball bearings, CBS News has learned.

According to the CBS News report:

Two bombs blew up seconds apart Monday at the finish line of one of the world's most storied races, tearing off limbs and leaving the streets spattered with blood and strewn with broken glass. Three people were killed, including an 8-year-old boy, and more than 170 were wounded.

A law enforcement source told CBS News senior investigative producer Pat Milton that one of the explosive devices appears to have been placed in a metal pressure cooker (a metal kitchen pot with a locked down top) which had been placed in a black nylon bag or backpack. Investigators also found pieces of an electronic circuit board possibly indicating a timer was used in the detonation of the bomb.

A law enforcement official told CBS News that the two bombs that exploded were made to look like discarded property. It is still unknown if one or both bombs were in garbage cans. One may have been on the sidewalk.

The bombs were described as "low explosive," but with "anti-personnel" packing. The official said there were apparently things like BB's, ball bearings and nails in the bombs. This is consistent with doctors reporting shrapnel pulled from victims.

Read the entire report from CBS News HERE.

To submit a comment on this article, your email address is required. We respect your privacy and your email will not be visible to others nor will it be added to any email lists.