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Rep. Dana Rohrabacher, left, who is leading a U.S. Congressional delegation to the Russian Federation, listens as Rep. Steven Cohen speaks during a news conference in the U.S. Embassy in Moscow, Russia, Sunday, June 2, 2013. The head of a U.S. congressional delegation to Russia says it learned little about what could have been done to prevent the Boston Marathon bombings, despite the best efforts of actor Steven Seagal. Some meetings were set up by Seagal, who met Russian President Vladimir Putin in March.

((AP Photo/Alexander Zemlianichenko))

MOSCOW (AP) — A senior Russian official says the Boston Marathon bombings could have been prevented if American officials had followed through with Russian intelligence.

Officials previously hewed to President Vladimir Putin's statement that Russia had no information that could have prevented the attacks.

"The Russian side warned the American side about the Tsarnaev brothers, but this information was not taken seriously by the American side, which is what led to that tragedy," Valentina Matvienko, the speaker of Russia's senate, said Tuesday, referring to suspects Tamerlan and Dzhokhar Tsarnaev, the Interfax news agency reported.

Russia told the FBI in 2011 that Tamerlan Tsarnaev had plans to join insurgents in Chechnya. The agency did a cursory investigation and closed its assessment on Tsarnaev.