At least 18 policemen were injured and 27 fans temporarily arrested as violence erupted after a German cup match in Berlin, police said on Sunday, according to dpa. Fans of fifth division Dynamo Berlin stormed a stand occupied with fans from visiting Kaiserslautern after the Bundesliga team won the first-round game 3-0 on Saturday. The Dynamo fans also fought the police. Several police officers required treatment in hospital, while police could not say how many fans were injured in the incidents.