One man died and three people were injured when rival football fans fought a running battle with knives and axes in the south-west Polish city of Wroclaw.
Police were stoned at the match
Police made 120 arrests after the battle which erupted during a match between two second-division teams, Slask Wroclaw and Arka Gdynia, police said.
The unidentified victim was found lying seriously injured at the scene and later died in hospital.
Michal Listkiewicz, head of the country's national football association, blamed the violence on "bandits posing as fans".
"They are murdering Polish soccer and all of our sport," he told the Polish state news agency PAP.
Crowds pelted policemen with stones during the trouble and they waded in to make arrests.
Three injured people were taken to hospital for further examination.
Arka won the match 5-0.