Salford are facing possible sanctions after Castleford pointed out they had 14 players on the field for a crucial spell towards the end of Saturday’s 34-30 defeat at the Salford City Stadium.
The Tigers today lodged a complaint with the Rugby Football League, who confirmed it is carrying out an investigation.
Castleford chief executive Steve Gill claims that three plays took place while the Reds had an extra man after making a substitution four minutes from the end of the match.
Salford held on for a win that lifted them off the foot of the table in Brian Noble’s first match in charge.
There is no precedent for Castleford being awarded the points but the Reds could be fined or face a points deduction if they are found to have breached the RFL operational rules.