"We carried out cross-border operations overnight. Over 30 terrorists were killed," President Recep Tayyip Erdogan said in a televised speech.
Turkish warplanes have pounded PKK bases in several regions in northern Iraq and earlier this month, its special forces crossed into Iraq to pursue Kurdish militants as part of an "anti-terrorist" campaign to flush the PKK out of its strongholds at home and abroad.
The group has hit back hard, killing dozens of police and soldiers in almost daily bomb and shooting attacks since July, which have left a two-year ceasefire in tatters.