Boston Marathon Attack: Circle Of Possible Bombers Narrows, Experts Say



” Details emerging from the Boston Marathon bombing so far suggest that the perpetrators are most likely to be identified as American jihadis or, possibly but less likely, antigovernment extremists, say counterterrorism experts.

Investigators have not offered any information about potential suspects and are still seeking tips and video from the public. Yet several experts who follow radical groups inside the US say the timing of the attack, the choice of weapon, the target, and the venue are all suggestive. Those things together are beginning to triangulate toward a small set of possible perpetrators, and, as is often the case, the weapon is key.

Two common pressure cookers packed with nails, ball bearings, and explosives were each rigged to a timer and used as a bomb, the FBI confirmed Tuesday. The two bombs exploded a block from each other 13 seconds apart at 2:50 p.m. – more than two hours after the winners of the marathon crossed the finish line.

“But at this point what we are potentially talking about is really just one or two types of individuals or small groups – both are home-grown terrorists, either home-grown Islamic jihadists or right-wing extremists.” “