A man was allegedly assaulted in Lincoln High Street at the weekend.
Lincolnshire Police has released CCTV images of two men they wish to identify.
It is believed the men may be able to assist with the investigation into the incident which happened at around 2.50am on Saturday, March 16.
Anyone with information, or who knows the pictured men, should contact police on 101 or via email at [email protected] quoting incident number 45 of March 16.
It can also be reported anonymously through the independent charity Crimestoppers on 0800 555 111.