Fighting broke out between rival fans of football
clubs Gais and IFK Norrköping outside of Gothenburg on Saturday afternoon. Police detained four people for drug-testing.
According to police there were between 20 and 30 football hooligans involved in the fighting which started at 2pm in central Landvetter.
"Four of the Gothenburg lads were brought in for testing as we suspected that they were under the influence of drugs," said Thomas Fuxborg at Västra Götaland police.
No one was reported to have been hurt in the brawl although a parked car was left with a smashed window, police report.