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The Boston Globe

Metro

Russia alerted US about Tamerlan Tsarnaev

Russian authorities warned the FBI in early 2011 that suspected bomber Tamerlan Tsarnaev may have been a follower of “radical Islam,” a revelation that raised new questions in Congress on Saturday about whether the Boston Marathon attacks that killed three and wounded more than 170 could have been prevented.

A senior congressional aide privy to the Boston Marathon terror investigation confirmed Saturday that the FBI received the warning after Tsarnaev’s apparently suspicious activities caught the attention of Russian authorities keeping close surveillance on militant Islamist groups in the Caucasus region of the former Soviet Union.

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