Sunday, 8th, in Joinville (Santa Catarina), fans of Atlético-PR and Vasco conflict in the stadium by the last round of the Brasileirão.
Supporters of Paraná and Rio teams teased until the principals invaded the part that was reserved for Rio fans.
Four injured fans brought to the Municipal Hospital São Jose.
In serious condition Willian Batista, 19, with head injury, the other is Estevão Viana, 24, the other two are Gabriel Ferreira Vitael, 20, and Diogo Cordeiro da Costa Ferreira, 29.
"They suffered injuries to the head and body due to kicks received in fights, "said the nurse manager of the hospital, Robson Duarte.