One man needed hospital treatment after a bar brawl, Sussex Police said.
The force said: “Police are investigating an altercation which left a man requiring hospital treatment in Worthing.
“A fight involving at least four men broke out between the bar and dancefloor area in Molotov Bar, in Chatsworth Road, at around 1.50am on Sunday 4 August.
“One man was taken to hospital for treatment to a serious cut to his head and has since been discharged.
“A second man suffered minor injuries.
“A 21-year-old man, from Worthing, was arrested at the scene on suspicion of attempted grievous bodily harm (GBH) with intent and assault occasioning actual bodily harm (ABH).
“He was released on bail while inquiries continue.
“Anyone who saw what happened or who has any other information is asked to contact police online or by calling 101, quoting serial 154 of 04/08.”