One Turkish soldier was killed and two others were injured in a PKK attack in Turkey's eastern Iğdır province bordering Iran, a security source said on Friday.

The incident took place when a group of terrorists opened fire at a 10-member commando unit patrolling near the Emince village of Aralık district at 2:30 a.m. local time [11:30 GMT], said the sources, who asked not to be named due to restrictions on speaking to the media.

The security forces retaliated against the attack, "neutralizing" one terrorist and injuring two others.

According to hospital sources, the injured soldiers are in stable condition.

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 nearly 40,000 people.