The Irish Football Association is expected to investigate violence after Monday's derby match between Glenavon and Portadown at Mourneview Park.
Missiles were thrown following the final whistle and fighting broke out between opposing fans at the Lurgan ground before calm was restored.
A steward suffered a broken cheekbone during the fighting while another was another was hit by a broken bottle.
Portadown earned a 2-0 victory in the Carling Premiership match.
Glenavon chairman Adrian Teer said that the club would be undertaking a "full internal investigation into the events" but refused to make any further comment.
Portadown's media officer Trevor Clydesdale said that the incidents sent out the wrong image for football.
"One of our stewards received a broken cheekbone and our chief steward was also hit by a bottle after they attempted to separate the fans," said Mr Clydesdale.
The trouble follows violence after a game between Cliftonville and Coleraine at Solitude earlier this month.
Coleraine player Johnny Black was punched by a Cliftonville supporter.