Police are hunting three men after a taxi driver was punched in the face in Aylesbury.
The men took the taxi to Park Street and got out without paying, police said.
One of the men then allegedly hit the driver, giving him a nose bleed.
The incident took place at about 2.10am on Sunday (June 2).
The men are all described as white and believed to be in their late teens.
Anyone with information should call police on 101.