Some 400 people in around 200 cars gathered outside the building at 1am on Sunday to protest against the police’s traffic controls earlier in the evening. Some people threw eggs and fires were lit on street corners.
“Around ten patrols were sent out, and were met with egg throwing and insults,” said police commander Mats Hörle.
Five people were arrested following the incident outside the police station. Several are suspected of assaulting police officers and attempted arson.
Street racing is an illegal form of car racing that takes place on public streets, often using cars specially adapted to go faster.