FBI: Boston Marathon Bombs Made From Pressure Cookers

FBI Photo | Photo Credits: FBI/AP

The FBI has revealed that one of the Boston Marathon bombs appears to have been made from a pressure cooker containing nails and ball bearings, NBC News reports.

Investigators have found fragments of dark nylon, possibly from a backpack containing the bombs, as well as pieces of what they believe was a pressure cooker used to make the bomb. Typically, a pressure cooker is used to speed cooking by creating a tight seal which builds pressure inside the pot. A pressure-cooker bomb was used in the 2010 attempted Times Square attack, as well as in Mumbai, India, in 2006.

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