Turkish security forces have killed three PKK terrorists in a clash in eastern Turkey's Tunceli province, security sources said Thursday.

The sources, who spoke on condition of anonymity due to restrictions on talking to media, said that the operation against PKK terrorist organization in Tunceli's Pulumur district began on Feb. 11 and ended on Thursday.

The sources said three terrorists have been killed in a clash during the operation, adding that their shelters had been destroyed and their equipment seized.

The sources added that four Turkish soldiers were wounded in the clash.

The PKK, listed as a terrorist organization by Turkey, the U.S. and EU, resumed its decades-old armed campaign against the Turkish state in July 2015.

The terrorist group has murdered over 800 security personnel and 300 civilians since then while also losing more than 10,000 militants in the meantime, who were either killed or apprehended in anti-terror operations.