diyarbakir turkey turkish military kill three kurdistan workers party pkk militants clash northern iraq near border turkey thursday even one turkish soldier also kill security source say source say four turkish soldier wound firefight kanimasi area iraq dohuk region 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 iraqi kurdish 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 military kill three pkk militants north iraq near border source