A man suffered a broken jaw after being punched during a late-night brawl in a taxi queue.
The 31-year-old victim was intervening in a scuffle that had broken out in the queue at the southern end of Palmerston Road, Southsea when the attack happened.
One of his friends was injured and as the victim went to help he was punched in the face by another man at about 2am on New Year's Day.
The offender is described as a white man, with short, fair hair and wearing a checked shirt. Detective Constable Jim Garrett, from Portsmouth CID, said: 'The victim suffered a fractured jaw, broken front teeth and cuts to his mouth. He was taken to the Queen Alexandra Hospital, Cosham, where he remains in a stable condition. His friend was not seriously injured.
'Please can anyone who witnessed this assault or has knowledge of the incident contact me as soon as possible?'
Call Det Con Garrett at Fratton station on 101 or Crimestoppers on 0800 555111.