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 between Piast Gliwice and Gornik Zabrze was abandoned because of fan trouble.
Ruch Chorzów hooligans briefly blocked a major highway in Katowice on Friday evening to burn a giant GKS Katowice flag.
Unia Hrubieszów fans were attacked by Górnik Łęczna hooligans during the match.
Two Ruch Chorzów fans clashed with away fans.
During the Promień Żary vs. UKP Zielona Góra match on Saturday in Poland, home fans stormed the pitch and attempted to get to the away end.