Four people have been arrested, including a Napoli fan who remains in serious condition, following a shooting that preceded the Italian Cup final.
Police say a Roma fan named Daniele De Santis fired the four shots and was arrested for investigation of alleged attempted murder.
The fan in serious condition, Ciro Esposito, was conscious at a Rome hospital awaiting surgery.
The start of the match was delayed for 40 minutes as officials attempted to calm fans down in the stadium, where a firefighter was injured by a flare thrown from the stands.
Napoli beat Fiorentina 3-1 for the trophy Saturday.
Police say De Santis acted alone and that he is also being investigated for fighting and a firearms violation.
The three fans who were shot were being investigated for fighting.