Wagner took control of government buildings in Rostov-On-Don and Prigozhin himself materialized in the Staff of Southern Military District and demands now Shoigu and Gerasimov (in Russian). So, it is a Kornilov Mutiny, of sorts, and now a lot becomes clear about Prigozhin and Wagner. This is getting serious and those people from Wagner who participate in this are now official traitors. I also want to point out Ostashko's description of General Alexeev.
The fact that the appeal of the First Deputy Chief of the Main Directorate of the General Staff of the RF Armed Forces, Lieutenant General Vladimir Stepanovich Alekseev, appeared on the Web, says a lot. In fact, this is a legendary person. He was behind the planning of many secret operations, the formations of a number of PMCs (including interacting with the Wagners at the dawn of the formation), carried out reconciliation in a number of regions of Syria. Through his line, various private security companies and PMCs sign contracts with the Ministry of Defense. It is possible that earlier he tried behind the scenes to resolve the conflict between Prigogine and Shoigu. That is why Alekseev is now speaking publicly.
7 Hours ago I quipped that he, likely, failed. The reason he failed is because he obviously didn't seriously psychologically profile Prigozhin, especially considering Prigozhin's outright criminal background as a thief and a robber, with two trips to prison for various violent crimes, and this is an extremely important indicator of character, which, as we saw today reared its ugly head of a sheer narcissist and, highly likely, asset. Whose asset, we are yet to learn. I guess Lieutenant General Alexeev has some splainin' to do. And the signs have been there all the time. I guess this was expected having a criminal (gopnik, really) heading some private army which obtained the access to heavy weaponry and now took command of a major Russian city of a key strategic importance and stabbed Russian Armed Forces in the back. This thing was planned by Prigozhin. This is a major failure of some people in MoD and especially among those who have been directly involved in Wagner's activity and contract's signing. In hindsight--this was coming.
Update: Vladimir Putin will shortly address nation.