Please excuse the 'source' ... apparently fighting over loot!
VLADIMIR PUTIN is facing a critical breakdown in military discipline and cohesion after Russian special forces became embroiled in a firefight with Wagner militia members.
Reports suggest that a bitter dispute broke out between a Russian Spetsnaz unit and Wagner fighters over the division of war loot, which ended in a "bloody firefight".
https://www.express.co.uk/news/world...ine-war-latest