Thirty-nine people have been arrested after violence broke out in the build-up to Aston Villa's game with Legia Warsaw in Birmingham on Thursday night, Report informs via BBC.
Four police officers were hurt in clashes with away fans near Villa Park.
West Midlands Police said officers were "faced with disgusting and highly dangerous scenes," including having flares thrown at them.
The Europa Conference League tie went ahead with away fans blocked from entering the stadium over safety fears.
Officers with batons and shields were seen trying to regain control of the area while missiles were launched at them as fans of the Polish side attempted to force their way through barriers.
Several videos posted on social media showed the disorder, including missiles being thrown at fans on the ground from a road adjacent to a stand.
West Midlands Police said one of the injured officers had been taken to the hospital, and two police horses and two police dogs had also been hurt.