Ajax fans caused disturbances in Amsterdam on Sunday following the announcement that several of their fixtures had been postponed due to police strikes.
Supporters set off flares, attacked buildings and clashed with officers. Local media showed fans grabbing bicycles and barriers and heading toward the police headquarters before authorities intervened to restore order.
Fans gathered to protest the postponement of three of Ajax's matches coinciding with police strikes over pensions.
"The situation is unstable at the police HQ in Amsterdam. Ajax fans are vandalising the building and police vehicles," Amsterdam police said in a statement on X.
"Despite several warnings, a group continues to seek confrontation. The mobile unit (elite riot police) is now carrying out charges to drive them away," police added.
Authorities decided that the Klassieker match between Ajax and Feyenoord could not proceed without a police presence. Sunday's match against Utrecht was also postponed.
However, another game, away at NAC Breda, went ahead despite the absence of police due to the strike.
Ajax is upset about being three matches behind in the championship and having to replay games at inconvenient times. The club is keen to recover from the previous season, where they struggled significantly in the Eredivisie table.
Their current season includes one win and one loss from two matches.
Police have denied claims that Ajax is being deliberately targeted. Officers were also on strike on Saturday during a significant climate demonstration in The Hague.
