Napoli fans celebrated the Serie A title all night and are looking forward to a parade on Monday, but knife attacks and fights have already darkened the celebrations, Italian media reported, quoted by BTA.
Napoli won its second Scudetto in three years on Friday after a 2-0 victory over Cagliari.
The team will hold a championship parade on Monday along the coast in open-top buses, with about 100,000 fans expected. Some schools and kindergartens will also be closed for the day, according to the city administration.
But the cheerful atmosphere also had its dark moments. According to the medical association Nessuno tocchi Ippocrate, around 100 people had to be hospitalized on Saturday night - almost three times as many as on New Year's Eve.
Injuries were caused by fireworks, knife attacks and fights. A 47-year-old man also died in a scooter accident, but it is not clear whether this was related to the festivities.
Police also reported several robberies, assaults and the seizure of weapons. A 26-year-old TikTok influencer with several hundred thousand followers is among those detained. According to authorities, he tried to break through a police cordon with two other people on a scooter. When stopped, he fled on foot and threw a loaded gun into a nearby park. After a fight in which two police officers were injured, he was arrested.