A football fan and a policeman have been stabbed during separate clashes ahead of a Champions League match in Milan.
The violence came ahead of AC Milan's home match against Paris Saint-Germain (PSG) on Tuesday night.
A group of around 50 Italian fans - wearing masks and helmets - have been accused of "ambushing" their French rivals, including by throwing flares, in the Navigli area of the city on Monday night.
A PSG fan was stabbed twice in the leg during the melee and was rushed to hospital.
Italian media said the victim, a 34-year-old Frenchman, suffered serious injuries - although his wounds are not thought to be lift-threatening.
Meanwhile, in a separate clash between police and PSG fans, an officer was also stabbed. The alleged culprit was arrested.
AC Milan condemned the violence in a post on X, formerly known as Twitter.
It said: "Football for us is passion, not hate. Sport is supposed to unite, not divide."
It comes after a Newcastle United fan was stabbed in the same area of the city in September ahead of the club's Champions League match against AC Milan.
The Italian side reached the semi-finals of the competition last season, but currently are bottom of Group F and without a win or a goal this time around.