NEW : ISIS says it killed 1,700 Iraqi troops in the attack . Sunni President says U.S. has carried out its first airstrikes against ISIS . President Barack Obama says 16 countries have offered assistance . The Syria military has approved a plan to strike ISIS in Syria , officials said . ISIS captured 16 villages in northern Syria in the past day , opposition group says .
NEW : Sunni President says U.S. has carried out its first airstrikes against ISIS . President Barack Obama says 16 countries have offered assistance . The Syria military has approved a plan to strike ISIS in Syria , officials said . ISIS captured 16 villages in northern Syria in the past day , opposition group says .