WASHINGTON - An FBI-led Joint Terrorism Task Force in Boston was alerted when one of the men who later allegedly carried out the Boston Marathon bombings traveled to Russia, US officials said on Wednesday in one of several disclosures that cast new light on the government's handling of the case.
The officials also said Russia, which had tipped off the FBI about its concerns over one of the men, Tamerlan Tsarnaev, in early 2011, made a second, identical request to the CIA in late September 2011.
As a result, a US intelligence official said, the CIA "nominated" Tsarnaev's name for inclusion on a government watchlist known as TIDE.
Reuters first reported on Tuesday that Tamerlan Tsarnaev's name was on that list, which is maintained by the National Counterterrorism Center and is separate - and much larger - than the US government's "no fly" list.
It remains far from clear that either the alert to the FBI or Russia's contact with the CIA could have helped uncover a plot that ultimately killed four people and injured more than 200 in Boston.