Authorities said the march in Paris, which drew 110,000 people, remained calm through Saturday afternoon, but tensions flared as demonstrations came to an end in multiple cities.

In Lyon, France’s third-largest city where gatherings were banned in parts of the city, the police used tear gas to disperse protesters. Forty people were arrested in Nice, where the protests were banned, while tear gas was used against protestors in Marseille, French broadcaster BFMTV reported.

Tensions also escalated during the afternoon in Toulouse, Lille, Nantes and Rennes, according to media reports, with protestors throwing projectiles at police and officers using water cannons to disperse them. Authorities in Lille, where about 15,000 people protested according to early estimates, extended their curfews for minors through Monday.

Nuñez, the interior minister, told police forces to be “uncompromising” with potential rioters earlier on Saturday, ahead of a day of protests that is leaving the country on edge.

“Today’s key words will be mobility, responsiveness and adaptability, so we can really act against high-risk groups… We must be absolutely uncompromising and hyper, hyper, hyper-responsive,” he said during a visit Saturday morning to the National Police Academy in Vincennes.

Nuñez was heavily criticized for his handling of last Saturday’s protests, and has been accused of underestimating both the number of protesters and the potential for violent incidents. He announced on Friday that 70,000 police officers would be deployed, 10,000 more than last weekend.