http://forum.stirpes.net/immigration-crime/18040-belgian-police-detain-nearly-200-after-riots.html
What happened was, North African youth attacked a supporter of Anderlecht with the intention of stealing his wallet last weekend during the final of the Belgian Cup. Those Northern Africans got beaten up by a group of supporters for doing so. During this week muslim youth called for a violent confrontation with the 'white supporters' of football club Anderlecht on internet blogs (Anderlecht being an area of Brussels with a very high concentration of non European immigrants, mostly Islamic) Anderlecht supporters agreed to that invitation and during Friday evening supporters from other Flemish football clubs came to Anderlecht as support for the Anderlecht fans, including supporters from Ajax Amsterdam and Lille in northern France.