How Russians would handle ethnic riots

I was recently asked how Russians would handle ethnic riots.  Normally, the regular police would be the first level of defense, but pretty soon the Mobile Special Militia Detachment (OMON) would be called in as they are the regular riot police.  I recently came across a video showing how special riot-suppression forces of the Federal Penitentiary Service (FSIN) train for that kind of events.  Though the OMON deal typically with