CIA made the request to add Tamerlan Tsarnaev's name to the terrorist database after the Russian government contacted the agency with concerns that he was associated with Chechen terrorists. About six months earlier, the FBI had separately investigated Tsarnaev, also at Russia's request, but the FBI found no ties to terrorism.
Mother of the Boston bombing suspects has said she is going to drop American citizenship.
Zubeidat Tsarnaeva and her husband are residents of Makhachkala, the regional capital of Russia’s Dagestan.
Zubeidat is accused the US of trying to “frame” her sons for the terror attack on the Boston Marathon earlier this month. “I’m thinking of giving up the citizenship over this incident. I think I’ll do that,” she said.
A twin blast ripped through Boston on April 15, killing three people and mutilating 200 runners near the finish line.
Dzhokhar Tsarnaev, 19, was caught late on 19 April after a dramatic chase. He has been admitted to hospital and is said to be in satisfactory health.
The only surviving suspect will stand the trial on charges of using a mass destruction weapon that killed three. His elder brother died of wounds he received during a shootout last Friday.
US issues arrest warrant for Boston suspects' mother
Zubeidat Tsarnaeva, the mother of two brothers who are accused of setting off two bombs at the Boston Marathon, will be arrested in the US if she chooses to pay a visit.
Tsarnaeva said on Wednesday that she and her husband would be flying to the US shortly to take part in court hearings on the case of her surviving son.
As it became known on Thursday, the US authorities have issued an arrest warrant for
Tsarnaeva was to appear before a Boston court on October 25th 2012 on charges of stealing $1,600 worth of clothes from a Lord & Taylor. She never turned up for court hearings.
On Wednesday, the FBI questioned Tsarnaeva in connection with the terrorist attack committed by her sons – Tamerlan and Dzhokar. According to the Tsarnaev brothers’ uncle Ruslan Tsarni, she could have “inspired” the two young people to commit an act of terror thanks to frequent visits to their house by a radical Islamic preacher, who spent hours talking to Tamerlan, the Tsarnaevs’ uncle said.
Sixteen hours after investigators began interrogating him, the surviving suspect in the Boston Marathon bombings went silent: He’d just been read his constitutional rights.
Dzhokhar Tsarnaev immediately stopped talking after a magistrate judge and a representative from the U.S. Attorney's office entered his hospital room and gave him his Miranda warning, according to four officials of both political parties briefed on the interrogation. They insisted on anonymity because the briefing was private.
Before being advised of his rights, the 19-year-old suspect told authorities that his older brother, Tamerlan Tsarnaev, 26, only recently had recruited him to be part of the attack that detonated pressure-cooker bombs at the marathon finish line, two U.S. officials said.
A remote control for a toy play car was used by the Boston Marathon bombers to set off their deadly explosives.
Remote control which included a transmitter powered by a rechargeable “C” battery, was found among the debris of the pressure-cooker bombs planted by brothers Tamerlan and Dzhokhar Tsarnaev, said Congressman Dutch Ruppersberger.
The Maryland Democrat said the FBI revealed the detonation system during a briefing about the April 15 attack, which killed three and injured more than 200.
“It was a remote control for toy cars,” Ruppersberger said. “Which says to me . . . they got the information on how to build the bomb from Inspire magazine.”
Tamerlan Tsarnayev, one of the Boston bombing suspects, was added to a terrorism database 18 months ago at the request of the CIA. The FBI had been investigating the suspect, but found no evidence of a threat, US officials said as quoted by BBC`s web site.
The Russian authorities had alerted Washington to the activities of Tamerlan Tsarnayev, who was believed to have links to radical Islamists but the FBI failed to find enough evidence of threat to US security.
The 26-year-old Tsarnaev was killed during a police operation last week. His brother Dzhokhar, 19, was injured and remains in hospital, where he is being interrogated over the bombs.
Three people were killed and more than 260 wounded when two devices exploded at the Boston Marathon on 15 April.
Voice of Russia, CBS News, RIA