3:00 pm UPDATE: Huffington Post reports that at least one of the Boston bombs was made from a 6-liter pressure cooker. It has been confirmed that one of the explosive devices contained metal shards and ball bearings. The other device contained nail shrapnel. Both bombs that detonated at the Boston Marathon yesterday are suspected to have been hidden in black duffel bags and placed on the ground before exploding.

According to a joint FBI and Homeland Security intelligence report from July 2010, a pressure cooker bomb was one of the three devices that were used by the Pakistani Taliban in their failed attempt to bomb Times Square in May 2010. The Pakistani Taliban has denied connections to the Boston Marathon bombing.

The report also states that pressure cooker bombs are commonly used in places such as Afghanistan, India, Nepal and Pakistan. “Placed carefully, such devices provide little or no indication of an impending attack,” says the report.

Authorities are working diligently to apprehend a suspect and to find more clues as to how the bombs were detonated.

11:00 a.m. UPDATE: The death toll from the Boston Marathon bombing has risen to 3, with one of the dead being identified as 8-year-old, Martin Richard, and there have been over 170 reported injuries thus far. The Massachusetts Governor confirms that despite numerous reports yesterday that two more undetonated devices were found, the two devices that exploded were the only devices found on the scene.

Obama addressed the nation late Monday afternoon in regards to the horrific tragedy. “We still do not know who did this or why,” Obama said from the Brady Press Briefing Room, “But make no mistake, we will get to the bottom of this, and we will find out who did this, we’ll find out why they did this.”

“The American people will say a prayer for Boston tonight,” he added.

It was reported by CNN that a few persons of interest with possible connections to the blast have been interviewed by authorities, including a 20-year-old Saudi man in the United States on a student visa. However, no arrests have been made or suspects named at this time.

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Krysta Loera is a writer and researcher with Ring of Fire.