Witnesses are being sought to a fight which occurred outside Pipers fish and chip shop in Tenby's St. George Street in the early hours of Monday.
The fight is said to have taken place at 12.30 am and anyone with information is asked to contact PC Nigel Lewis at Tenby police station on (01834) 842303 or Crimestoppers on 0800 555111, who may give a reward.
The fight was one of a number of alcohol-related incidents dealt with by police over the Bank Holiday weekend, with several people being arrested for public order incidents.
"Sunday was an extremely busy night for us," said a police spokesman. "There were a number of alcohol-related public order incidents.
"However, the high profile policing in the town centre helped to prevent a number of further incidents."