A pressure cooker bomb is an improvised explosive device (IED) created by inserting explosive material into a pressure cooker and attaching a blasting cap into the cover of the cooker.
Pressure cooker bombs have been used in a number of attacks in the 21st century. Among them have been the 2006 Mumbai train bombings, (failed to explode), the 2010 Times Square car bombing attempt (failed to explode), and the 2013 Boston Marathon bombing.
Pressure cooker bombs are relatively easy to construct. With the exception of the explosive charge itself, most of the materials required can be easily obtained. The bomb can be triggered using a simple electronic device such as a digital watch, garage door opener, cell phone, pager, kitchen timer, or alarm clock. The power of the explosion depends on the size of the pressure cooker and the amount and type of explosives used.
The containment provided by the pressure cooker means that the energy from the explosion is confined until the pressure cooker itself explodes, creating a relatively large explosion using low explosives and generating potentially lethal shrapnel.
French police prevented a terrorist attack in Strasbourg, France, on New Year's Eve 2000. Ten Islamic militants were convicted for the plot.
From 2002–04, pressure cooker bombs were widely used in terror and IED attacks in Afghanistan, India, and Pakistan.
In 2003, a terrorist from Chechnya named Abudullah, carrying a pressure cooker bomb detonated explosives and killed six people before being arrested near Kabul International Airport in Afghanistan. The Taliban claimed responsibility. In 2004, the Department of Homeland Security issued a warning to US agencies about pressure cookers being converted to IEDs.