Police want to speak with 12 men following a mass brawl in Liverpool city centre.
Violence erupted at a Mixed Martial Arts (MMA) event being held at the Black-E in Chinatown last month with up to 20 people involved in the fracas.
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CCTV images have been released of the men that officers wish to speak with as they look to ascertain who was involved in the chaotic scenes at the venue.
Two men required hospital treatment after a man forced his way into the ring which was followed by punches being thrown in the melee as well as a chair.
Both of the injured parties have refused to cooperate with detectives, which has prompted the release of video stills in a bid to establish the full circumstances.
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Merseyside Police have carried out CCTV, witness and forensic enquiries but believe the 12 men photograph could help with their investigation.
Anyone who recognises the men, or the men themselves, are asked to call 0151 777 4065, Crimestoppers anonymously on 0800 555 111 or at www.crimestoppers-uk.org