Tarnovia fans were attacked by a group of Unia Tarnow hooligans armed with clubs at a match on Saturday.
Fighting broke out between rival fans at a Polish third division match between Ruch Chorzow and Motor Lublin on Friday.
On this day in 2014, Legia and Jagiellonia fans clashed in the stands at the Polish Army Stadium during their Ekstraklasa match.
Widzew Lodz’s Polish cup match against Slask Wroclaw was stopped for several minutes on Tuesday after trouble broke out in the away end.
A brawl broke out between Wloclavia Wloclawek and Legia Chelmza fans during their Polish IV Liga match on Sunday.
A Polish IV Liga match between Karpaty Krosno and JKS Jaroslaw was abandoned on Sunday following a pitch invasion by home fans.
A Polish lower-league match between Okocimski Brzesko and Tarnovia Tarnow was abandoned on Saturday after rival fans clashed on the pitch.
A Polish Cup match between Wisla Sandomierz and Korona Kielce was halted on Wednesday after a pitch invasion.
A brawl broke out between rival fans before a Polish lower-division match on Sunday.
Legia’s away game against Lech Poznan was abandoned on Sunday after Lech hooligans threw smoke bombs and invaded the pitch.
GKS Tychy’s home match against Ruch Chorzów was briefly halted on Saturday because of trouble in the stands.
Saturday’s derby clash between Piast Gliwice and Gornik Zabrze was abandoned because of fan trouble.