The notorious Rusich group (St Petersburg neo-nazis affiliated with Wagner) says it is now deployed in Ukraine. Its commander Aleksey “Fritz” Milchakov has been wounded, so his friend Yan “Slavyan” Petrovsky is now in charge.
Rusich group fought in Syria and likely in Africa (Libya, CAR) as part of Wagner group. During the first war in Ukraine, Milchakov was posting gruesome photos of dead Ukrainian soldiers, possibly incriminating himself in war crimes.