Lancashire police are investigating David Moyes over an alleged incident in a wine bar in the town of Clitheroe.
The former Man Utd boss was in the Emporium Wine Bar and Restaurant with a friend when the incident happened on Wednesday evening.
Police have released a statement saying:
Police are investigating a report of an assault at the Emporium wine bar in Clitheroe.
Officers attended the bar at about 10pm on Wednesday and it was reported that a 23-year-old local man had been assaulted by a 51-year-old man. He did not require hospital treatment.
Inquiries are ongoing and we are speaking to a number of people to try to establish the circumstances.
There are a number of differing accounts which we need to work through to try to establish exactly what has happened. No-one has been arrested at this stage.
According to The Sun, police were called after two men were seen fighting. While The Mirror say that the 23-year-old claims to have been hit over the head and then fell to the floor injuring his shoulder.
Moyes is one of the favourites to take over from Neil Lennon as Celtic manager after he stepped down today.