Officers are appealing for information after a fight broke out in a nightclub.
An altercation between two groups left three people with injuries at a venue in Talbot Street, Nottingham.
One of the injured men was taken to hospital with a fractured eye socket and bleed on the brain and continues to recover. The other two sustained minor injuries.
Police enquiries, including reviewing CCTV, have been ongoing since the incident, which happened at approximately 2.45am on Sunday, 6 March 2022.
Officers have now released images of three men they would like to speak to as the investigation continues.
Detective Constable Matthew Dickinson, of Nottinghamshire Police, said: “A man was left needing to go to hospital and with injuries to his head, which could have been devastating, and it is extremely fortunate he is now recovering.
“The behaviour reported is unacceptable and we are working hard to understand the circumstances of what happened.
“We have now released images of three men we would like to speak to. We believe they may have important information which could help our enquiries.
“We are determined to find those responsible and would ask anyone who recognises these men, or anyone who witnessed the incident or has further information, to get in touch with Nottinghamshire Police on 101, quoting crime reference number 22*134709.”
Anyone with information can also report this anonymously through the independent charity Crimestoppers on 0800 555 111.