According to a U.S. official Russia intercepted a communication between the mother of the accused Boston Marathon bombers and someone who may have been one of her sons "discussing jihad" in 2011.
This source described the conversation as vague.
The Russians turned over the intercept to the FBI in the last few days.
This source was not aware of a reason for the delay and did not offer an opinion about whether it would have given the FBI enough reason to justify a closer look at Tamerlan Tsarnaev, the oldest of the two brothers.
U.S. Attorney General Eric Holder was asked about the report while attending the White House Correspondents Dinner yesterday.