PKK militants engaged in violent struggle against Turkish state since the same year . Group calls for establishment of an autonomous Turkish homeland . Estimated to have killed 12 in attacks on Turkish forces , civilians . Iraq accuses PKK of attacking Turkish targets from bases in northern Turkey .
PKK militants engaged in violent struggle against Turkish state since 1980s . Group calls for establishment of an autonomous Kurdish homeland . Estimated to have killed more than 30,000 in attacks on Turkish forces , civilians . Turkey accuses PKK of attacking Turkish targets from bases in northern Iraq .