It happened in Godwin Street in the early hours of 28 January – around the same time as a 35-year-old man was seriously injured in an incident close to Bentley’s Bar.
The males are believed to have travelled to the scene in a black Audi A3 and police want to hear from anyone who may recognise them.
Detective Constable Glen Doran, of Bradford District CID, said: “While this incident occurred at around the same time there is no suggestion that these males were involved in the assault in which a man was seriously injured.”
Four men - three aged 18 and one 19 - have been arrested and bailed in connection with the assault.
The victim is continuing to recover in hospital.
Call Bradford District CID on 101, or Crimestoppers anonymously on 0800 555111.