On CNN, Peter Bergen stated that the terrorist bombings in Boston was "likely right-wing" extremists.
Here's the quote: "One of the things that I'd be looking at, once the device, if it is a device, is found, what kind of explosives were used. If it, for instance, if it was hydrogen peroxide, sort of a signature of al Qaeda. If it was more conventional explosives, which are much harder to get hold of now, it might be some other kind of right wing extremists...
"We've also seen other extremist groups, right wing groups, attacking, for instance, trying to attack the Martin Luther King parade."
Here's the video:
Elsewhere, conspiracy theorists were happy to pin the explosions on conservatives:
Boston (place of Tea Party) on Tax Day (April 15th) bombed by "Right wing extremist" #EndTheFed "Conspiracy Theorist" helped by the FBI?
— Mark Dice (@MarkDice) April 15, 2013
Boston bombing on tax returns day, nutjob tea party type element makes most sense. NK must b pissed that their war threat has been forgotten
— Shane Flynn (@Shefl) April 15, 2013
Update 2: Bergen repeated his claim again about 30 minutes later on CNN.