A rocket hit the U.S. embassy inside Baghdad's fortified Green Zone on Saturday, killing two people and wounding at least six, a diplomatic source said. The rocket struck after dark on the eve of Iraq's elections. An explosion could be heard across the city centre and sirens sounded in the Green Zone shortly after the blast. A U.S. embassy official confirmed the blast. "It was a rocket. Two people are dead and at least six are wounded," a diplomatic source said.