POLICE have launched an investigation into an assault outside The Halliwell Jones Stadium last night.

A 19-year-old man from Wigan was taken to Warrington Hospital as a 'precautionary measure' after he was hit by an 'unknown object' near to Dallam Road at 10pm.

Police say enquiries continue into the incident.

A spokesman for the force said: "Cheshire Police are investigating reports of an assault that took place at The Halliwell Jones Stadium at approximately 10pm on Thursday.

"The victim, a 19-year-old man from Wigan, was leaving The Halliwell Jones Stadium at the Dallam Road end when he was hit by an unknown object which caused a small laceration to his head.

"Following the incident the victim attended Warrington Hospital as a precautionary measure."

Fan footage, which was posted on Twitter, captures the moment rugby supporters clashed. 

Stewards can be seen surrounding the group after unrest broke out shortly after the final whistle was blown.

It was reported how 11,250 fans attended the match between Warrington Wolves and Wigan Warriors to watch the Super League battle.

The match finished with Warriors maintaining their perfect record with a 38 - 16 win.

One witness posted his disgust on Twitter after reportedly seeing Wolves fans throwing stones and bottles.

Anyone with information can call Cheshire Police on 101 citing incident number 1050 of March 9 or call Crimestoppers anonymously on 0800 555111.

Warrington Wolves have confirmed investigations are ongoing. 

WARNING: Offensive language can be heard in the below footage.