Turkish security forces in the southeastern province of Mardin have killed two PKK terrorists, including one of the most wanted militants who was on the grey list, the Interior Ministry confirmed Wednesday.

The grey-listed terrorist was identified as Hanım Çelik code-named "Agirin." She had a TL 300,000 bounty on her head.

The wanted list is divided into five color-coded categories, with red marking the most wanted, followed by blue, green, orange and grey, depending on the sensitivity of their criminal activity.

Turkish security forces regularly conduct counterterrorism operations in the eastern and southeastern provinces of Turkey where the PKK has attempted to establish a strong presence and bases. The Turkish Armed Forces (TSK) also carry out cross-border operations in northern Iraq, a region where PKK terrorists have hideouts and bases from which to carry out attacks in Turkey.

In its more than 30-year terror 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 some 40,000 people, including women and children. The terrorist organization isn't just active in Turkey but operates throughout the region, particularly in Syria and Iraq. The Turkish government has repeatedly called on the Iraqi government to eradicate the PKK threat. If not, Ankara says the TSK will exercise its rights and launch a cross-border operation in the area, as it did during Operation Euphrates Shield and Operation Olive Branch in Syria.