A violent brawl involving about 100 OGC Nice supporters broke out late on Thursday, May 21, in the Canal Saint-Martin area in the 10th arrondissement of Paris [1, 2]. Police intervened amid the chaotic scenes, arresting 65 people and seizing weapons including knives with blades up to 20 cm, balaclavas, and padded gloves [1, 2].

The clashes left six people injured, including one seriously harmed. Some of those injured were bystanders not connected to the football rivalries [1]. The violence involved knives and broken bottles, creating a dangerous environment in a normally busy part of Paris [1].

Paris Mayor Emmanuel Grégoire accused some Nice fans involved of far-right links and said they were "accosting and violently attacking Parisians" [1]. The mayor's comments pointed to political tensions underlying the disorder.

Philippe Diallo, head of the French Football Federation, condemned the violence. He said, "This is everything we dislike about football – namely violence – when a French Cup final is supposed to be a celebration" [1]. The violent incidents overshadowed preparations for the French Cup final between Nice and Lens, scheduled for Friday, May 22 [1, 2].

Authorities increased security measures around the match to prevent further outbreaks. The French Football Federation and local police vowed to take strict action against fan violence. The final will proceed under heightened police presence in Paris.

The unrest in Canal Saint-Martin marks a disturbing episode ahead of a major football event. Police custody of 65 arrested individuals is ongoing as investigations continue.

The French Cup final between Nice and Lens is set to kick off on Friday, May 22, under reinforced security conditions [1].