Stoke City say they will ask police for an explanation after a video appearing to show their fans being pepper-sprayed by officers emerged on Saturday evening.

A video circulated on Twitter appears to show a number of police officers using pepper spray on Stoke fans in the concourse of Preston's Deepdale stadium during their 2-2 draw on Saturday.

Lancashire police have confirmed they are aware of an incident and will be launching a formal investigation.

"There was an incident of disorder inside the stadium involving a number of Stoke supporters, who were attempting to forcibly exit the stadium," said Lancashire Police in a statement.

"Officers deployed were faced with many aggressive fans and used proportionate force to protect themselves and ensure the disorderly fans did not spill out into the surrounding area.