He was a member of an illegal group led by Chechen warlord Aslan Asambayev.
The mercenary was carrying the passport of a Turkish resident, Nadik Wahid Abas Agly, a sub-machine gun and ammunition.
On Thursday, Russian law-enforcers reported that a Turkish national was killed near the village of Ersenoi on February 2. Arms, ammunition and video tapes showing militant groups' activities were found on him. The other Turkish mercenary was killed near the same village.