Hampshire police are appealing for witnesses after a man was assaulted in Wonderland nightclub, in Basingstoke.
Detective Constable Andy Panter said: "This was a serious assault which has resulted in the victim needing surgery to his jaw."
Anyone with any information is asked to contact Det Con Panter at Basingstoke CID on 101.
More top news
Friday morning's forecast for the east of the region
Friday morning's forecast for the west of the region
Gravitational waves - ripples in spacetime - have been detected by scientists a century after Albert Einstein predicted their existence.