Celebrations of Paris Saint-Germain's Champions League triumph descended into chaos across Paris as violent clashes broke out between fans and police. Thousands of supporters flooded the streets after PSG's historic victory, but scenes of jubilation quickly gave way to unrest, vandalism, and confrontations with security forces. Authorities arrested more than 400 people overnight, including hundreds in Paris, after fires were set, businesses were damaged, and public transport services were disrupted. Dramatic footage showed flares lighting up the sky, vehicles burning, shop windows smashed, and riot police deploying tear gas to disperse crowds near the Champs-Élysées and Arc de Triomphe. French officials condemned the violence as "absolutely unacceptable" while security forces remained on high alert ahead of a massive victory parade expected to draw around 100,000 supporters near the Eiffel Tower. The unrest has once again raised concerns about public safety during major football celebrations in France, where similar violence marred PSG's previous European triumph.