Osijek fans clashed with police after their team lost to Lokomotiva Zagreb in the last game of the Croatian First League season on Saturday.
Hajduk Split hooligans attacked members of the Bad Blue Boys outside a bar in Zagreb on Sunday afternoon.
Hajduk Split fans clashed with police in the stands during their Croatian Cup final against Dinamo Zagreb in the eastern city of Vinkovci on Wednesday.
A group of Ponikve fans attacked rival Karlovac fans after a match between the sides on Saturday.
Rijeka fans were attacked by local fans before the game.