Some trouble started after the derby between Djurgården and AIK when a couple of AIK supporters stole a banner belonging to Djurgården. They then decided to take it back and trouble started with the police. At 0:17 you can see how AIK supporters from the upper section throw down the banner to the lower section. Djurgården supporters did not manage to take back the banner.
Riots between hooligans and police on the streets of Stockholm. Few AIK supporters got arrested.