The spokesperson said detectives were also investigating disorder during the game.
“A number of witnesses have been spoken to and inquiries are continuing,” they said.
Anyone with information is urged to contact Cheshire Police.
A spokesperson for the sport’s governing body, the Rugby Football League (RFL), said it was “aware of events that took place at the game”.
They said the RFL did not condone such behaviour and would “speak with both clubs, following which a thorough investigation will be undertaken”.
The BBC has approached both Warrington Wolves and Widnes Vikings for comment.