Tarnovia fans were attacked by a group of Unia Tarnow hooligans armed with clubs at a match on Saturday.
Around 15 masked Unia Tarnow hools attacked Tarnovia fans after invading the Tarnovia Stadium where current and former Tarnovia Tarnow players were playing their traditional New Year match.
One Tarnovia fan was injured in the attack.
The attackers ran away before police arrived.