Kurdish rebels on Friday ambushed a Turkish military patrol, killing two soldiers and wounding four others in southeastern Turkey, an official said.
The attack near the city of Bingol came a day after the European Court of Human Rights called for the retrial of imprisoned Kurdish rebel chief Abdullah Ocalan, saying he did not receive a fair trial in 1999.
The clash, which started Friday morning, was still underway and Turkish reinforcements were rushing to the area, the official said, speaking on customary condition of anonymity.
Rebels of the Kurdistan Workers' Party, or PKK, have battled government forces in a conflict that has killed more than 37,000 people since 1984.
Clashes in Turkey's predominantly Kurdish southeast tapered off after a rebel truce in 1999, which followed the capture of their leader, Abdullah Ocalan. But there has been a recent surge in violence.