Intelligence report identified vulnerability before bombing
The 18-page report was written by the Boston Regional Intelligence Center, a command center funded in part by the Department of Homeland Security that helps disseminate intelligence information to local police and first responders.
The "joint special event assessment" is dated April 10. It notes that at the time there was "no credible, specific information indicating an imminent threat" to the race.
"The FBI has not identified any specific lone offender or extremist group who pose a threat to the Boston marathon," the report reads.
Two officials read parts of the report to a Tribune Washington Bureau reporter.
Since the blasts, the FBI has acknowledged that agents had interviewed one of the suspected bombers, Tamerlan Tsarnaev, in 2011 but determined that he did not pose a threat. Customs agents were aware that Tsarnaev had traveled to Russia in 2012, but decided that he didn't require additional questioning when he returned to the U.S. later that year.
What was known to the FBI and other agencies before the Boston bombings was being examined by the House Homeland Security Committee on Thursday in the first of a series of hearings investigating the attacks.
Top police officials in Boston testified to the panel that the FBI never shared with local law enforcement agencies that Tsarnaev had visited Dagestan and that FBI and Russian officials were concerned he and possibly his younger brother, Dzhokhar Tsarnaev, might become radicalized extremists.
"We would have liked to have known," said Edward F. Davis III, commissioner of the Boston Police Department. But, he said, "we were not aware of the two brothers, we were not aware of their activities."
In fact, Davis testified, it was more than three days after the April 15 bombing, after Tamerlan was killed in a police shootout and Dzhokhar was on the run, before he learned about the Tsarnaevs.
"We didn't look at the brothers until after the shootout," he said.