Police officers detain a demonstrator during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers detain a demonstrator during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Burning objects are seen on the street during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers dressed in riot gear prepare to confront demonstrators during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

A police officer with a dog stands on the street during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

A demonstrator holds a smoke flare during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Demonstrators protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021. Image used for illustrative purpose.

A woman puts her hands up as she stands next to police officers during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers detain demonstrators during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

A demonstrator holds a banner reading "the mask need to fell" during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

A demonstrator wears a mask during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers dressed in riot gear cross the street during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers walk on the street during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

A demonstrator gestures in front of police officers dressed in riot gear during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Demonstrators protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers walk on the street during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers walk on the street during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Police officers dressed in riot gear stand on the street during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

A demonstrator holds a placard next to police officers dressed in riot gear during a protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.

Demonstrators protest against the Belgian government's restrictions imposed to contain the spread of the coronavirus disease (COVID-19), in Brussels, Belgium December 5, 2021.