Source close to the investigation tells Fox News that 'pressure cookers' — stuffed inside black nylon backpacks and used possibly as timers — were in both bombs that exploded yesterday at the Boston Marathon finish line, killing 3 and wounding 176. Another source says the style of device closely resembles that commonly seen in Afghanistan and Pakistan.
More clues. This type of device was also used by the Times Square bomber Faisal Shazad when he targeted tens of thousands of Times Square revelers on a Saturday night.
The NY Times is reporting this: (hat tip George)
A few details about the explosives emerged on Tuesday. Representative Michael McCaul, a Texas Republican who heads the House Homeland Security Committee, said the authorities believe the explosives were likely a “pressure-cooker device,” similar to improvised explosive weapons used against American troops in Iraq and Afghanistan. Mr. McCaul, a former federal prosecutor who received briefings Tuesday morning from the F.B.I. and Homeland Security officials, said the authorities still did not know whether the attack was a foreign or domestic plot. ’