Boston Marathon: Pressure Cooker Container bombs used.
Boston Marathon: Container bombs showing up in United States, France
By The Associated Press
on April 16, 2013 at 12:37 PM
LONDON — The explosives used in the Boston Marathon bombing were crude devices often called pressure cooker bombs, according to a person briefed on the investigation.
The person spoke on condition of anonymity because the investigation in Boston was still ongoing.
While container bombs ave been frequently used in Afghanistan, India and Pakistan, in recent years they have also shown up in plots in the U.S. and France.
Explosives typically are placed inside a pressure cooker — a commonplace cooking utensil in many countries — and the device is then detonated using everyday electronic equipment such as digital watches, garage door openers, cellphones or pagers. Pressure builds inside the container and shrapnel is expelled. Al-Qaida affiliates have provided training and manuals on how to build such devices.