Russia flagged both FBI and CIA on Tamerlan

 Russia had flagged both the FBI and the CIA about the radicalisation of Chechen-born Tamerlan Tsarnaev, one of the suspects in the Boston twin blasts, but the American agencies let him off their radar.

The Russians provided same kind of information to both the FBI and CIA about radicalisation of Tamerlan with the latter being instrumental National Counterterrorism Center adding Tamerlan to a database known as the Terrorist Identities Datamart Environment (TIDE) - the main database.

The Russian intelligence agency FSB had provided information on Tamerlan, including possible birth dates and the spelling of his name in Cyrillic letters, to the CIA in Moscow in late September 2011, The Washington Post reported.

Senior US intelligence official said that CIA had "nominated (Tsarnaev) for inclusion in the watch listing system" and had shared all of the information it had been given by Russia, including "two possible dates of birth, his name and a possible variant."The information was passed to CIA headquarters on October 4 and relayed roughly two weeks later to the National Counterterrorism Center, an agency that serves as a clearing house for threat data and manages the TIDE database," the daily said.

Three months after Tamarlan's name was posted on the master data base, he traveled to Russia on January 12, 2012.

Quoting unnamed officials, the CNN said the Russians did not provide much detailed information on the bombing suspect. "There were no details, no examples, no threads to pull. Because of the rather light nature of the information we did go back to them and asked can you tell us more. We never heard back," the official told the CNN."They did not give a case report back when the United States inquired," another official was quoted as saying.

Three people died and more than 200 people were injured when two bombs went off in quick succession near the finish line of the Boston Marathon last week.

While 26-year-old Tamerlan died last week in a police exchange of fire, his younger brother Dzhokhar, 19, was arrested a day later. He is injured and is being treated in a Boston hospital.