Serb Stefan Dimitrijevic, a pro-Russian mercenary in Ukraine, was killed in Lugansk.
The announcement was given on the social network Facebook by another Serbian mercenary, Stevan Milosevic.
In Ukraine, alongside the forces of Russian aggression, there are a large number of Serbian mercenaries.
A large part of them belong to the Serbian ultranationalist forces, which are often seen in the Republic of Kosovo.
Dimitrijevic, already killed in Ukraine, had taken a photo in North Mitrovica a few years ago.
Meanwhile, the other mercenary who announced the death of his friend, Stevan Milosevic, was in Gazimestan where he took photos with the radical Serbian cleric Amfilohije.