BOSTON (CBSNewYork/AP) — One of the explosive devices used in the bombings of the Boston Marathon appeared to have been in a metal pressure cooker packed with nails and ball bearings, CBS News reported.
As CBS 2’s Lou Young reported, a law enforcement source told CBS News that one of the explosive devices appeared to have been placed in a metal pressure cooker 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.
The two bombs that exploded were made to look like discarded property, a law enforcement official told CBS News. It is still unknown if one or both bombs were in garbage cans. One may have been on the sidewalk.