It happened outside the London Trader pub in the Old Town on Saturday night (April 24.)
At around 11.35pm oofficers were called to East Beach Street, to reports of a fight involving up to six men.
Police attended and found one man with a serious wound to his hand, and two other men who had suffered facial injuries.
A 26-year-old man was arrested on suspicion of wounding with intent. He was interviewed and has been released on conditional bail while enquiries continue.
Officers investigating the matter would like to speak to anyone who saw what happened or who may have captured any relevant footage on a mobile phone, CCTV or dash cam.
Anyone with information is asked to contact police online or by calling 101 quoting serial 1618 of 24/04. Alternatively, you can contact the independent charity Crimestoppers anonymously on 0800 555 111
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