Police are appealing for witnesses following a suspected assault which is believed to have occurred on Thursday, September 27, shortly after 6pm at The Cardigan Arms in Corby.
A man is alleged to have been assaulted by another man in the pub during the incident.
A 26-year-old man from Corby was arrested on suspicion of assault and released on bail.
Officers are keen to speak with anyone who was at the pub on the evening of September 27.
Witnesses to this incident, or anyone with information about it, can call Northamptonshire Police on 101 or information can be given anonymously to Crimestoppers on 0800 555111.