At least ten people were detained in Brussels, where riots erupted after Morocco beat Belgium 2-0 at the World Cup in Qatar, the Belgium-based RTBF broadcaster reports.
Several people set trash containers on fire and threw bricks at vehicles in the center of Brussels on Sunday after Belgium's loss.
Media reports said police used water cannons and tear gas and that there were casualties.
The Belgium-based broadcaster said that about ten administrative arrests and one judicial arrest were made amid the riots.
Meanwhile, Le Soir said that about ten arrests were made in the port city of Antwerp on Sunday.
Transport disruptions were reported in Belgium amid the Sunday riots.
Earlier, late goals by Abdelhamid Sabiri and Zakaria Aboukhlal powered Morocco to a 2-0 win over Belgium in a Group F match being played here at Al Thumama Stadium.
This turned out to be yet another upset of FIFA World Cup 2022.
Also watch: FIFA World Cup 2022, BEL vs MAR: Morocco stun Belgium 2-0 in Group F encounter
Following his side's loss to Morocco, Belgium manager Roberto Martinez said that the first goal by the opponents affected the outcome heavily and his side failed to convert their chances into goals.