If I had to guess I’d say Yemen’s al-Qaeda in the Arabian Peninsula is the chief suspect.

Via Discovery News:

Who did it? That’s the question on everyone’s mind after two explosions at the finish line of the Boston Marathon on Monday killed three and injured as many as 100 people. Boston police say they uncovered two additional homemade bombs that were also set to go off. There also was an explosion at the JFK Library just south of downtown Boston that may or may not have been related to the others.

Massachusetts Gov. Deval Patrick called the bombings “an attack” during an afternoon press conference. As details become more clear, some terrorism experts say the explosions carry the hallmark of a foreign terrorist group.

“The list of suspects is long; any number of people have an axe to grind against the United States,” said Ken James Ryan, a terrorism expert at Cal State University, Fresno. “It could be any number of people: Al-Qaeda and North Korea, or any other wannabee organizations. Who knows? At this point someone will take credit for it.”

Even though Monday is tax day in the United States, a important anniversary for domestic anti-government or anti-tax groups, Ryan believes that the attack was committed by a foreign group. First, the planting and detonation of more than one bomb takes the kind of technical know-how and desire to hurt and kill a large number of people.

Also, the fact that the bombs were close by, and went off within moments of each other, suggests that “somebody knows what they are doing,” Ryan said. “This is not the work of an amateur.”

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