A number of Paris Saint-Germain supporters have been left hospitalised following the club's Ligue 1 trophy parade.
According to a Red Cross worker on site, several people were injured after violence broke out between pseudo-fans and law enforcement officials.
An estimated 10,000 supporters lined the streets of Paris to celebrate the club's first title since 1994, but a statement from police official Fabien Vanhemelryck suggested the number of fans attending had been unexpected.
“The province may have underestimated the event,” he told RMC. “We should have expected this. We were on the same device as for returning Olympians on the Champs-Elysees. It was not the same crowd, not the same fans.”
Damage was also caused at the site of the parade, with windows around the Trocadero, the Champs-Elysees and at the foot of the Eiffel Tower left smashed, while a car was set on fire.
The mayor of Paris, Bertrand Delanoe, simply added that the incidents were "a shame", but the club have condemned "a few hundred supporters who had nothing to do with football" in a strongly-worded statement published on their official website.
They thanked the loyal fans who were in attendance, and expressed their "deep regret for having to shorten the trophy ceremonies".
And the statement ended with a message of intent to the the rest of Europe as the club look ahead to next season.
"Paris Saint-Germain is more determined than ever to pursue its plans to build a major European club worthy of the capital, far from the actions of those who would destroy his dream."
As a result of the violence, the boat ride on the Seine that was originally planned has been cancelled.