Riots break out between supporters in the stands after the UEFA Conference League semi-final match between AZ Alkmaar and West Ham United FC at the AFAS stadium, in Alkmaar on May 18, 2023. Supporters of Dutch club AZ Alkmaar clashed with riot police and opposition fans late May 28, 2023, after losing 0-1 to West Ham United in a Europa Conference League semi-final duel, news and social media reports said. The incident is the latest in a series of escalating incidents of football violence in the Netherlands, which has worried both sports officials and politicians alike.,Image: 777211951, License: Rights-managed, Restrictions: Netherlands OUT, Model Release: no