Watch the end after the fight. The russians attacked someone in the crowd and looked like he might have hit an officer. Meanwhile a man in the ring attacks mcgregor. Then another man they are saying is also russian jump over the cage wall and starts punching mcgregor in the back of the head. As they try to stop that someone else starts hitting mcgregor.
Mcgregor lost by the way. So very wierd for a winner of a fight to start attacking the audience.
https://twitter.com/HeelByNatureYT/status/1048801268724985856?s=20