“A demonstration on the Coolsingel (street) resulted in riots. Fires have been set in various places, fireworks were set off and the police have fired several (warning) shots,” Rotterdam Police said in a tweet.
“There are injuries related to the fired shots,” the police force added, noting that police officers were at the scene “in large numbers and are trying to restore order.”
Several hundred people had gathered to voice opposition to government plans to restrict access to indoor venues to people who have a “corona pass”, showing they have been vaccinated or have already recovered from an infection.
The pass is also available to people who have not been vaccinated, but have proof of a negative test.
Police issued an emergency ordinance in Rotterdam, shutting down public transportation and ordering people to go home. Water cannons were deployed and police on horseback carried out charges to disperse the crowds, police said.
The authorities also called on bystanders and people who recorded images of the riots to send the footage to police for further investigation.
Video posted on social media showed burnt out police cars and rioters throwing fireworks and rocks at police.