Turkish police have identified four "Islamic State" (ISIS) terrorists  as the killers of two young anti-ISIS activists found beheaded in October in the southeastern city of Sanliurfa, local media said Tuesday, according to AFP.

The main suspect was Talas El Surur, a Syrian who befriended the pair by claiming he had fled the jihadist group, the Dogan news agency said.

Ibrahim Abdul Qader, 20, and his friend Fares Hamadi were found beheaded at a friend's house on October 30. They were members of  the "Raqa Is Being Slaughtered Silently" (RBSS) group.