Hertha Berlin: Police and prosecutors are searching for 18 hooligans who caused violent clashes during the football match against FC Schalke 04. The police have evaluated over 600 hours of video material to identify the perpetrators. The hooligans attacked police officers with projectiles and injured several officers. The reason for the violent clashes is disputed. The police complain of massive fan violence, while the Hertha fan association speaks of an overzealous police response. The numbers showed the extent of the escalation: According to police reports, 31 fans and 21 police officers were injured. The second-division club FC Schalke 04 expressed great concern about the violent clashes. The police have already arrested a suspect. The mood was tense - soon the situation escalated. There were attacks on police officers, arrests, and further violence. The top game became a tragedy: The ultras mourned in the east curve the death day of former president Kay Bernstein, then thousands left the stadium after 16 minutes in protest against the police operation. What exactly led to the violent clashes is disputed. Police and the Hertha fan association, as a fan representative, described the course of events differently.