PARIS (AP) ― A celebration of Paris Saint-Germain’s first league title since 1994 was canceled Tuesday, a day after rioting during festivities in the French capital led to 21 arrests and injuries to more than 30 people.

“Thugs won’t have the last word in Paris,” Paris Mayor Bertrand Delanoe declared.

Fans threw stones and other objects at police, who replied by firing tear-gas canisters, and store and car windows near the Champs Elysees were smashed. Three police were among the injured.

“I would like to express my disgust and anger with regards to the surge of violence that several hundred thugs were responsible for,” Delanoe said. “I ask the interior minister to step up the fight against this type of phenomenon outside of the Parc des Princes stadium.”

PSG players had been scheduled to show off the championship trophy from city hall’s balcony on Wednesday evening, but those plans were scrapped, the Paris mayor’s office said.