Members of Congress are calling the bombings at the Boston Marathon acts of terrorism and vowing to bring the perpetrators to justice.

Texas Congressman Michael McCaul (Bill Clark, Getty Images)

Texas Republican Michael McCaul, the chairman of the House Committee on Homeland Security, says the question is whether the terrorism is foreign or domestic.

California Democrat Dianne Feinstein, who chairs the Senate Intelligence Committee, also called it a "terrorist incident."

President Barack Obama didn't use the word in his brief remarks, but a White House official later said the incident was being treated as terrorism.

A U.S. intelligence official says two other bombs were found near the end of the course. There's been no quick claim of responsibility.


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