Investigators have reportedly found a circuit board that they think triggered the Boston Marathon bombs.
The Boston Globe's Shelley Murphy reports:
Investigators combing through the aftermath of the deadly Boston Marathon terrorist attack have recovered a circuit board in the area of one of the two blasts that they believe was used to detonate the bombs, according to an official briefed on the investigation.
The Associated Press previously reported that the explosives used in the attack "were contained in 6-liter pressure cookers and hidden in black duffel bags on the ground," according to a person familiar with the investigation.
At least one of the explosives was made out of a pressure cooker, which have been used in bombs detonated during attacks in Afghanistan, India, Nepal and Pakistan, according to the AP.
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