Officers are keen to speak with the men in this CCTV footage in connection with a brawl in Nottingham city centre.
The incident began at Bar Baa in Goosegate, before it spilled out into the street, continued into Brightmoor Street where a man was knocked unconscious and ended in Cranbrook Street where another man was knocked out, and subsequently required hospital treatment.
A 22-year-old man has been arrested on suspicion of assault and bailed pending further enquiries.
Police are appealing for information about the incident, which took place at about 2.30am on Tuesday, April 12.
Anybody with information should all police on 101.