Turkish National Defense Minister Hulusi Akar addressed the commanders of the troops via video link, saying: "Operation Claw-Tiger is going very well."
"We will continue with the same seriousness and determination and hopefully we will successfully end this operation," Akar said.
On Monday, the ministry announced the start of Operation Claw-Eagle in northern Iraq, noting that Turkish fighter jets had destroyed caves where terrorists were taking shelter.
The operation was carried out against terrorist bases in Sincar, Kandil, Karacak, Zap, Avasin-Basyan and Hakurk.
Operation Claw-Tiger began on Wednesday.
In its more than 30-year terror campaign against Turkey, the PKK -- listed as a terrorist organization by Turkey, the US and EU -- has been responsible for the deaths of nearly 40,000 people, including women, children and infants.
