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By Ian Simpson and Mark Hosenball WASHINGTON (Reuters) - U.S. investigators were looking into claims by the Islamic State militant group that it was behind a failed attack on a Texas exhibit of cartoons of the Prophet Mohammad in which two gunmen were killed, but officials said on Tuesday they doubted the group's direct involvement. The Syria- and Iraq-based Islamic State (IS) said on its official online radio station that "two soldiers of the caliphate" carried out the attack on Sunday in Garland, a suburb of Dallas.
NEW YORK (AP) — The U.S. stock market sank Tuesday, taking a break after a two-day run. Chevron and other oil giants fared better than the rest of the market as crude oil climbed above $60 a barrel for the first time this year.