Wagner mercenary group fighters wave flags of Russia and Wagner group on top of a building in an unidentified location, in the course of the Russia-Ukraine conflict, in this still image obtained from a video released on May 20, 2023, along with a statement by Russian mercenary chief Yevgeny Prigozhin about taking full control of the Ukrainian city of Bakhmut. Press service of “Concord”/Handout via REUTERS