Footage has been posted online of the build-up to a scuffle in the tunnel between the players at Saturday's Grand Final.
The unsavoury incident happened as players were walking back to the dressing rooms at half-time.
It has been claimed Warrington fans were throwing things onto the pitch, and they were sarcastically applauded by Wigan's Morgan Escare, who is then shoved by Bryson Goodwin.
Romain Navarrete retaliates, leading to players from both teams wading in.
The RFL say the scuffle will be included in the match commissioner's report, so no action will be taken until Monday at the earliest