AZ Alkmaar have issued 43 stadium bans after West Ham United fans were attacked during their Europa Conference League semi-final defeat.
The Premier League side won the second leg in the Netherlands 1-0 to secure a 3-1 victory on aggregate.
In a statement, AZ said more bans could follow in the future.
European football's governing body Uefa will review reports of the incidents before deciding on any action.
The club said: "AZ has now issued 43 stadium bans in response to last week's disturbances. It concerns visitors who were involved in the misconduct surrounding the European semi-final in Alkmaar.