ankara turkey measure northern iraq target civilians instead focus organize referendum kurdish independence turkish prime minister binali yildirim say friday comment appear back-track president tayyip erdogan warn week iraqi kurds would go hungry ankara halt flow truck oil across border iraqi kurds overwhelmingly back independence historic referendum monday defy neighbor include turkey fear vote could renew regional conflict way make civilian residents pay price referendum yildirim say speech northwestern turkish province canakkale measure take take decision hold referendum ankara vow economic security political step far specify little action immediate aftermath vote erdogan say could stop flow trade across border warn kurds would go hungry leave lurch start impose sanction say speech tuesday close oil tap revenues vanish able find food truck stop go northern iraq hundreds thousands barrel oil day flow across turkey along pipeline northern iraq connect region global oil market iraq include kurdish region turkey third-largest export market 2016 export total 8.6 billion economy minister nihat zeybekci say friday currently obstacles export iraq turkey region large kurdish population fight three-decade-old insurgency largely kurdish southeast fear referendum inflame separatist tensions home turkish military kill three kurdistan workers party pkk militants clash northern iraq near border turkey thursday even one turkish soldier kill security source say say four turkish soldier wound firefight kanimasi area iraq dohuk district across border turkey cukurca district clash occur turkish iraqi troop hold military exercise 100 km 60 miles west habur border gate part coordinate step two countries response independence referendum turkish soldier years deploy various part northern iraq include kanimasi prevent pkk militants cross border turkey security source say commanders pkk designate terrorist group turkey unite state european union base mountains northern iraq turkish warplanes frequently carry cross-border air strike pkk target report clash land rare 40,000 people kill conflict since pkk launch separatist insurgency 1984. turkish measure northern iraq wo n't target civilians pm say