The Rugby Football League (RFL) is to investigate the crowd trouble that marred the end of Saturday's Million Pound Game between Salford Red Devils and Hull KR.
Salford clinched a dramatic 19-18 victory in golden-point extra time to seal their Super League survival, relegating Rovers to the Championship at Craven Park.
However, emotions spilled over after the final whistle, with fans clashing on the field of play.
"Games with so much at stake often mean emotions run high," said RFL chief executive Nigel Wood.
"But that does not excuse the minority of fans who behaved unacceptably following the final whistle.
"The RFL will conduct a full investigation into these incidents and will work with the police and club involved to ensure anyone found to have acted violently is dealt with appropriately and also banned with immediate effect."