Islamic State claims attack on Indonesian policeman in Riau: Amaq

CAIRO (Reuters) - Islamic State claimed responsibility for an attack on Wednesday in Sumatra, Indonesia that killed one policeman and wounded two, the group's Amaq news agency said. It offered no evidence in support of the claim. Indonesian police shot dead four of the assailants after they used samurai swords to attack the officers, a police spokesman said. (Reporting by Omar Fahmy; Writing by Eric Knecht; editing by John Stonestreet)