Most of the arrests were made before the match and related to possession of fireworks. The rioters had gathered at De Kuip in the run-up to the game, which was played without an audience.
A group of 100 to 150 people threw fireworks and bottles at the police. The Ajax players bus, when it arrived at the stadium, was also attacked with smoke bombs and fireworks.
Even after the Ajax players bus had entered the stadium, it remained unsettled in the vicinity of the Kuip for some time, according to the police. It was then decided to deploy a water cannon, among other things.