Four PKK terrorists were "neutralized" in the southeastern Sirnak province, according to a security source on Saturday, Anadolu Agency reports.
Turkish authorities often use the word "neutralized" in their statements to imply the terrorists in question either surrendered or were killed or captured.
The terrorists were detected by unmanned air vehicles in the Beytussebap district of the province, said the security source, who asked not to be named due to restrictions on speaking to the media.
The operation is ongoing, the source added.
In its more than 30-year terrorist campaign against Turkey, the PKK -- listed as a terrorist organization by Turkey, the U.S. and the EU -- has been responsible for the deaths of nearly 40,000 people.