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.
A man has suffered a fractured jaw after being attacked at a nightclub in Basingstoke.
The assault happened at 1.30am on Sunday, July 21 when the 19-year-old was punched in the face in a seemingly unprovoked attack.
He sustained a fractured jaw and had to undergo surgery.
The attacker is described as white, of stocky build, aged in late teens to early 20s, between 5ft 6ins and 5ft 8ins and had short brown hair.