ankara turkey iran iraq agree consider counter-measures kurdish northern iraq plan independence referendum turkey foreign ministry say thursday joint statement foreign minister three countries voice concern referendum would endanger gain iraq make islamic state reiterate fear potential new conflict region meet three minister emphasize referendum beneficial kurds kurdish regional government krg agree regard consider take counter-measures coordination statement say statement give detail possible measure say minister new york attend unite nations general assembly call international community intervene turkey president tayyip erdogan threaten impose sanction kurdish northern iraq turkish troop also carry military exercise near border central government baghdad iraq neighbor western power fear vote could divide country spark wide regional conflict arabs kurds cooperate dislodge islamic state stronghold mosul statement say turkish foreign minister mevlut cavusoglu iranian foreign minister javad zarif iraqi counterpart ibrahim al-jaafari express concern conflict surface result referendum would prove difficult contain kurds say determine go ahead vote though non-binding could trigger process separation country already divide along sectarian ethnic line three minister also voice strong commitment maintain iraq territorial political unity foreign ministry statement say turkey pull forward cabinet meet national security council session friday referendum also convene parliament extraordinary meet saturday chairman rule ak party parliamentary group say thursday turkey iran iraq consider counter-measures kurdish referendum