Scott Brown: Boston Marathon Bombings 'Cowardly,' 'We Need To Fight Back' (VIDEO)

Former Massachusetts Sen. Scott Brown (R) reacted to the twin bombings at the finish line of the Boston Marathon on Monday, saying that he was upset by the "cowardly" act of "terrorism."

“I was shocked initially, but now I'm mad," Brown said during an appearance Fox News, where he serves as a contributor. "It’s cowardly for the perpetrator or perpetrators to have facilitated this type of terrorism.”

Brown went on to recall the typical revelry of Patriots' Day in Boston, a day when many Bostonians take in an early Red Sox baseball game before heading over to the marathon to greet finishing runners. On Monday, the holiday was marred when the blasts ripped through a crowd of spectators, killing at least three and injuring more than 140 others.

“It’s a new world, and I'll tell you what, this was cowardly and we need to fight back and stand strong as Americans first,” Brown said.

Asked to address now-refuted reports about a supposed Saudi suspect in custody, as well as criticism of President Barack Obama for not using the word "terrorism" in his statement, Brown said he was reassured by the president's response.

“The president ... acted thoughtfully and judiciously, as he should," Brown said. "I know that he is actively engaged, because that's how he is."

For more on the Boston bombings, click over The Huffington Post's liveblog for up-to-the-minute coverage.