WASHINGTON U.S. lawmakers grilled top security officials on Tuesday about the handling of the Boston Marathon bombing investigation and why one of the suspects flagged as a possible Islamist radical was not tracked more closely.
FBI officials briefed members of Congress behind closed doors in Washington about the investigation into the April 15 blasts that killed three people and injured 264 others.
Authorities say the ethnic Chechen brothers, who immigrated to the United States a decade ago from the predominantly Muslim region of Dagestan in Russia's Caucasus, detonated two bombs made from pressure cookers near the finish line of the iconic foot race.
Tamerlan Tsarnaev, 26, was killed in a shootout with police and his younger brother Dzhokhar Tsarnaev, 19, lies wounded in a Boston hospital charged with using weapons of mass destruction.
Investigators have focused on a trip to Dagestan last year by Tamerlan Tsarnaev and whether he became involved with or was influenced by Chechen separatists or Islamist extremists there.
Russian authorities flagged him as a possible Islamist extremist in 2011. The FBI interviewed him in Massachusetts but found no serious reason for alarm. Some lawmakers have questioned if more could have been done at the time.
Senators said after a briefing by FBI Deputy Director Sean Joyce and other officials that there may have been a breakdown in communication that kept authorities from tracking his apparent radicalization.
Senator Saxby Chambliss of Georgia, the ranking Republican on the Senate intelligence committee, said the briefing raised questions about the flow of information among law enforcement and intelligence agencies.
"I think there has been some stonewalls, and some stovepipes reconstructed, that were probably unintentional, but we've got to review that issue again, and make sure there is the free flow of information," he said.
"I can't say the FBI dropped the ball. I don't see anybody yet that dropped the ball," he said. "That may develop."
The senators said there was tough questioning during the briefing.
"We had a full discussion back and forth over the process that's followed, and we need to keep at that, and we need to see if there are any loopholes in it, and that we fix those loopholes," said Democratic Senator Dianne Feinstein of California, who chairs the committee.
Lawmakers said they were unable to confirm an NBC report that the Tsarnaev brothers had been motivated by the U.S. wars in Afghanistan and Iraq or speculation that they had used fireworks to provide the explosives used in their bombs.
SUSPECT'S WIFE COOPERATING
The wife of the dead bombing suspect is assisting authorities and in absolute shock that her husband and brother-in-law were accused of the deadly blasts, her lawyer said.
"She cries a lot," attorney Amato DeLuca said of Katherine Russell, 24, an American-born convert to Islam who married Tamerlan Tsarnaev in June 2010. "She can't go anywhere. She can't work."
People interviewed by Reuters described Tamerlan Tsarnaev as proud but angry, never quite achieving his own idea of the American dream, and instead finding solace in a radical form of Islam adopted by fighters in his homeland.
The sisters of the bombing suspects said they too did not know what had happened to their brothers.
Ailina Tsarnaev, who lives in West New York, New Jersey, and her sister Bella issued a statement through their attorneys expressing their sadness over "such a callous act."
"As a family we are absolutely devastated by the sense of loss and sorrow this has caused," they said. "We don't have any answers but we look forward to a thorough investigation and hope to learn more."
But relatives interviewed in Russia said they did not believe the brothers carried out the bombings. "No one is accusing them of anything here," Said Tsarnaev, a local photojournalist, told Reuters.
Dzhokhar Tsarnaev's condition improved to "fair" from "serious" on Tuesday as he recovered from gunshot wounds at Beth Israel Deaconess Medical Center, where in an impromptu hearing on Monday he was charged with two crimes that could result in the death penalty if he were convicted.
Since recovering enough to communicate by nodding his head and writing, the younger Tsarnaev has told authorities he and his brother acted alone, learned to build the bombs over the Internet and were motivated by a desire to defend Islam because of "the U.S. wars in Iraq and Afghanistan," NBC News reported.
NBC cited an unnamed U.S. counterterrorism source who has received multiple briefings on the investigation. Reuters could not confirm the information.
Tsarnaev was captured on Friday night following a massive, daylong manhunt that shut down greater Boston.
Police say the Tsarnaev brothers also killed a university police officer on Thursday night and wounded a transit police officer on Friday morning.
The family of 8-year-old Martin Richard, the youngest person to die in the attacks, privately buried their son on Tuesday.
"This has been the most difficult week of our lives and we appreciate that our friends and family have given us space to grieve and heal," parents Denise and Bill Richard said in a statement. "We laid our son Martin to rest, and he is now at peace."
(Additional reporting by Scott Malone in Boston, Svea Herbst-Bayliss in Providence, Rhode Island, Richard Cowan in Washington and David Jones in New Jersey; Writing by Ellen Wulfhorst and Daniel Trotta; Editing by Eric Beech and Lisa Shumaker)
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