It's not uncommon for terrorists to be relatives. A look at family ties and terrorism.
Bostonians seem 'dazed' by explosions
Two bombs exploded in the packed streets near the finish line of the Boston Marathon on Monday, killing two people and injuring more than 130 in a bloody scene of shattered glass and severed limbs that raised alarms that terrorists might have struck again in the U.S.
Will Snyder, a digital news specialist with NPR, spent this afternoon interviewing people in Boston.
He said many took the blasts very personally.
“The people I spoke with really felt like somebody had just, you know, cold-cocked them, just hit them out of the blue," he said, "like, 'Why were you doing that? Why would you do that to that event, such a wonderful part of Boston?'"
Snyder says people still looked "dazed" by the experience, and hardly anyone was talking about who might have done this or why. Instead, he said, there was a feeling in the air for hours that the incidents weren’t over.
A White House official speaking on condition of anonymity because the investigation was still unfolding said the attack was being treated as an act of terrorism.
President Barack Obama vowed that those responsible will "feel the full weight of justice."
A senior U.S. intelligence official said two other bombs were found near the end of the 26.2-mile course in what appeared to be a well-coordinated attack.
The Associated Press contributed to this report.