A 37-year-old man was taken to hospital with head injuries and another male was arrested after an alleged scrap outside the House of Fraser department store in Lincoln.
Lincolnshire Police launched an investigation into the High Street assault, which happened at around 3am on Thursday, March 19.
The force said a 43-year-old man from Lincoln was arrested.
The victim’s injuries are not believed to be life-threatening.
Police would like to hear from anyone who saw the altercation, or has any information in connection with it, to contact them on 101 or via email at [email protected] quoting incident 24 of March 19.
Alternatively, it can also be reported through the independent charity Crimestoppers anonymously on 0800 555 111.