Dortmund police say 180 arrests were made Saturday after serious rioting before the 141st Ruhr derby between Borussia Dortmund and Schalke left 11 people injured, including eight officers.
A majority of those detained were Schalke fans, though 17 Dortmund supporters were also charged with a variety offences including assault and resisting police officers.
Police spokesman Michael Stein says the fans had the ''potential for violence not seen for a long time. Their violent acts came to a head particularly against the police, who were there to protect all football fans attending the derby. We don't accept it and don't want it in Dortmund.''
Around 1,200 officers were on hand for what German media has described as the worst rioting in the area for years.
