istanbul turkish military vehicle hit improvise explosive device southeastern province hakkari kill one soldier security source say monday device detonate militants outlaw kurdistan workers party pkk vehicle pass road near turkey border iraq source say turkey largely kurdish southeast rock violence follow collapse 2-1/2-year ceasefire state pkk 2015. autonomy-seeking pkk take arm 1984 40,000 people die conflict consider terrorist organization turkey unite state european union turkish soldier kill pkk attack southeast source