SALT LAKE CITY -- U.S. Rep. Jason Chaffetz says he's not convinced the two brothers suspected in the Boston Marathon bombings acted alone and suggests they may be part of a broader plot.
The Utah Republican, a member of the Homeland Security Committee, urged investigators on Friday to look into whether the suspects were part of a larger terror network.
"I don't think it's necessarily just two kids who watched some YouTube videos and went awry and decided to do this mayhem," Chaffetz said on C-SPAN's "Washington Journal" program. "No, I worry that they were radicalized in a way that others may have also been radicalized."
Chaffetz described the suspects - Tamerlan Tsarnaev, who is dead, and Dzhokhar Tsarnaev, who is in a prison hospital - as "punks."
Investigators have said it appears the brothers were not part of a terrorist organization and were angry about the U.S. wars in Afghanistan and Iraq.
Investigators said while Tamerlan Tsarnaev had traveled to Russia, they have found no evidence he received guidance there leading to the bombings.
The two are accused of planting two shrapnel-packed pressure-cooker bombs that killed three people and wounded more than 260 at the finish line of the April 15 road race.
Chaffetz said Homeland Security Committee members have received classified briefings on the case and he's not alone in questioning whether the suspects had help.
"There are also lots of us that aren't convinced this is just an isolated case," he said. "One of the things that concerns me is right at the very beginning, the officials quickly said, `Oh, this is an isolated case.'"
Chaffetz said he expects Congress to closely examine how the investigation into the bombings has been handled and hearings could start as soon as next month.