Footage has shown police in Poland using a water cannon on Chelsea supporters before their Europa Conference League final against Real Betis.
A clip in Wroclaw shows water powering from a blue van, flattening a number of fans who quickly disperse.
Reporters on the ground claim tier gas was also used and police formed a barrier between fans.
The scenes come after more police intervention a day earlier when tear gas was also used in an attempt to stop fighting between rivals fans.
Videos of the violence circulated on social media with individuals throwing bottles and chairs at each other.
The incident took place outside the Kombinat pub and Guinness pub in Solny Square.
Polish police in riot gear were captured dispersing the chaos with helmets and riot shields before spraying tear gas in the direction of Chelsea fans.
The Provincial Police Headquarters in Wroclaw later released a statement saying they were trying to identify those involved.
“The fans scattered in different directions and currently the police officers of the criminal division are conducting activities aimed at identifying them,” they wrote.
“The number of preventive and operational police forces and their saturation is so large in places where residents and sports fans gather or move around that everyone can feel safe.
“Firefighters from the Municipal Headquarters of the State Fire Service in Wroclaw and rescuers are also ready to respond immediately, especially in the area of the stadium and all fan zones.”
More to follow.
