Wagner Group captures headquarters of the Southern Military District and the building of the Ministry of Internal Affairs in Rostov, the headquarters of Russia's base of operations for War in Ukraine
It actually is much worse than it seems - I did a write up over on Mastodon to explain why and how (https://mastodon.social/@andrei_chiffa/110599724720727202). The TLDR is that cities taken by Wagner mercs will be hard to retake without leveling, all internal protection troops are either tied or were lost in Ukraine, and mercs themselves have nothing to loose and all the revenge to take.
It's very strange how things are going right now. The fact that they are quite effortlessly moving hundreds of kilometers through Russian territory is quite telling.