Detectives want to identify three men following a serious assault at a nightclub in Preston.
At around 3am on October 18, a 30-year-old man was attacked in Cameo in Market Street.
The victim was knocked unconscious and later treated at Royal Preston Hospital for head and facial injuries.
Following CCTV enquiries, police would like to speak to these men, pictured, in connection with the investigation.
Det Con Richard Clancy, of Preston CID, said: “This was a shocking and brutal attack which left the victim with serious head and facial injuries.
“This man was assaulted in a busy nightclub and we want to find those responsible.
“We are particularly keen to speak to these men following the incident and would urge anyone who recognises them to contact police immediately.”
Anyone with information can contact police on 101 quoting crime reference SA1613947.
Alternatively the independent charity Crimestoppers can be called anonymously on 0800 555 111 or at crimestoppers-uk.org.