Zeljeznicar and Sarajevo fans fought on the pitch of the Grbavica Stadium prior to their match on Saturday.
About an hour before the start of the game, a small group of Sarajevo fans ran on to the pitch and approached the Zeljeznicar stand.
They threw flares and attempted to rip a giant banner from the rival stand, prompting Zeljeznicar fans to invade the pitch and confront them.
According to local media reports, a Sarajevo fan was injured during the fight.
