The tightened corona measures have again caused serious protests in Belgium.
Around 8,000 people took part in the protests in the Belgian capital, the police said on Sunday. There were clashes between demonstrators and police.
Fireworks and objects were thrown from one group at police officers, who used tear gas and water cannons.
In Belgium, corona rules have been tightened again for a few days, including the requirement to wear a mask to all children aged six and over and indoor events limited.
The anger of the demonstrators was also directed against the fact that unvaccinated people have not been allowed to go to restaurants and bars for some time.
Two weeks ago, protests against the Corona rules had already led to violent riots, and the police were surprised by the size of the demonstration with at least 35,000 participants. Violent demonstrators set wooden pallets on fire and attacked police vehicles.
On Sunday the police were on duty with a significantly larger number. Special forces equipped with protective shields and helmets were stationed at key points in Brussels. Helicopters and drones circled over the city.