Lincolnshire Police are appealing for witnesses after an assault at a Lincoln nightclub on Sunday.
The incident happened inside Revolution night club on Park Street between midnight and 12.15am on May 19.
A 34-year-old man was stood near the bar when he was allegedly punched in the head by another man, injuring his eye.
There was then an altercation in the club, and a group of males and females were ejected out of the club.
Anyone who witnessed or have any information about the incident is asked to contact PC Graham Lawrence from Lincoln CID on 01522 885244, or 101.