A 26 year old man suffered a facial injury when he was assaulted by another man outside of the shop at around 1.30am on Sunday 22 May. The victim also lost consciousness as a result of the assault.
Detectives believe other people were in the area at the time and are therefore asking anyone who may have witnessed the incident or knows anything about it to come forward.
Anyone with information is asked to call Humberside Police on 101 quoting crime reference number CW/2189524. Calls can also be made anonymously to Crimestoppers on 0800 555 111.