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Official: Suspect says Iraq, Afghanistan drove Boston bombings
(CNN) -- The surviving suspect in the Boston Marathon bombings has cited the U.S. wars in Afghanistan and Iraq as motivating factors behind last week's attack, a U.S. government official said Tuesday. Dzhokhar Tsarnaev has been able to communicate with investigators in a limited fashion from his hospital bed and told them that neither he nor his brother Tamerlan, now dead, had any contact with terrorist groups overseas. The official cautioned that the interviews were preliminary, however, and that Tsarnaev's account needs to be checked out.