Group : Kurds are clashing with Christians in town where many Assyrians were killed . ISIS is holding many Assyrian Christians hostage in northeastern Syria , Assyrian leader says . lawmakers visiting the nearby Ayn al-Asad air base , where some 400 U.S. military personnel are stationed to train Iraqi pilots in the fight against ISIS . Extremist group plans to release a video message threatening to kill Christians , he says .
Group : Kurds are clashing with Christians in town where many Assyrians were killed . ISIS is holding many Assyrian Christians hostage in northeastern Syria , Assyrian leader says . Extremist group plans to release a video message threatening to kill Christians , he says .