Russian National Guard (Rosgvardiya) officers patrol an area around the Kremlin in Moscow, on June 24, 2023. Russian President Vladimir Putin on Saturday acknowledged a "difficult" situation was unfolding in the southern city of Rostov-on-Don, where the Wagner mercenary group has taken control of key military sites in an effort to oust Russian military's top brass. (Photo by AFP) (Photo by -/AFP via Getty Images)