NEW : Some rocks hit the embassy building , a U.S. Embassy spokesman said . Some police fired water cannons . Video shows protesters running from weapon - wielding officers . Some demonstrators threw rocks at the officers ; in some case , officers threw rocks back . The consulate took emergency measures .
NEW : Some rocks hit the embassy building , a U.S. Embassy spokesman said . Some police fired water cannons . Video shows protesters running from weapon - wielding officers . The consulate took emergency measures .