A man was assaulted and a taxi was damaged during an incident outside Mirage nightclub in the early hours of Monday May 6.
Two people were arrested after the incident on Buckingham Street at 4.15am yesterday morning during which the windscreen of a taxi, parked outside Taste of Poland, was smashed.
The victim, a 29-year-old man, was taken to hospital after receiving a cut to his head.
He has since been discharged - meanwhile another man sustained a cut to his arm which did not require hospital treatment.
A 29-year-old man from Lincoln was arrested on suspicion of affray and a 32-year-old man from Aylesbury was arrested on suspicion of causing grievous bodily harm without intent - both have now been released under investigation.
Investigating officer Detective Constable Jemma Tamplin said: “I believe that some witnesses filmed this incident and I am therefore urging these people to get in touch with police.
“Similarly, if anybody else witnessed this incident, or has dash-cam footage from the area, please contact police.”
Anyone who witnessed the incident should call 101 quoting reference 43190135242.