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Reports: CIA Added Boston Suspect To Terror Database

Tsarnaevs' Representatives Talk To Reporters
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WATCH: A lawyer and human rights activist who are helping the parents of suspected Boston Marathon bombers Tamerlan and Dzhokhar Tsarnaev talk about the status of the case and what might happen to Tamerlan's body.

U.S. officials say the CIA added the deceased Boston Marathon bombing suspect to a terrorist database 18 months before the deadly April 15 explosions.

The twin blasts killed three people and injured more than 260.

The FBI has already said it investigated 26-year-old Tamerlan Tsarnaev but had found no evidence of a threat.

The officials, who spoke on condition of anonymity, said the CIA added Tsarnaev to the database after Russian intelligence officials contacted their U.S. counterparts in September 2011 about their concerns over Tsarnaev.

The revelations raised fresh questions over why U.S. authorities did not further investigate Tsarnaev, who died last week from injuries after a shoot-out with police.

His younger brother Dzhokhar, 19, has been charged with terror offenses including the use of a weapon of mass destruction.

Based on reporting by AP, the BBC, and "The New York Times"