SEE IT: Pressure cooker, backpack likely used in Boston Marathon bombings found by FBI

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

NEW YORK (PIX11) – FBI investigators believe they have found the remains of a pressure cooker and another metal container that exploded Monday during the Boston Marathon, killing three and wounding 176 people.

Boston pressure cooker

FBI investigators announced Tuesday the remains of what they believe is likely the pressure cooker used as an explosive device in the Boston Marathon bombing.

Investigators also found a shredded, black nylon backpack which the pressure cooker bomb was likely inside of when it was placed near the crowded marathon route, according to a joint FBI and Homeland Security report.

Backpack Boston Marathon

The tattered remains of a black backpack that FBI investigators believe was used to conceal the pressure cooker.

Another metal container that is believed to have exploded 10-15 seconds later, was found with the tattered remains of a second backpack less than a block away.

The explosive used is still not known, pending a chemical analysis.  Both containers were packed with an improvised collection of shrapnel — “possibly including nails, BBs, and ball bearings.”

Bombs made from pressure cookers were also used in the failed May 2010 attack in Times Square, and are “extremely common in Southwest Asia and have been used in a number of high profile bombings in India, Pakistan and Afghanistan.”  How-to guides for making pressure cooker bombs are easily accessible on various Internet sites and in extremist publications, such as “Inspire”, the al-Qaeda publication.

The FBI and the DOHS also provided the following tips for identifying a possible pressure cooker bomb by the following signs:

— (U) Protruding wires or fuses;
— (U) Unusual smells such as chemical odors;
— (U) Wetness or unusual stains on a container; and
— (U) Apparent abandonment of a pressure cooker in a high traffic, unusual, or otherwise strategic location.

Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.