Police are looking for witnesses to a row over the speed of a boat on a Norfolk river - which escalated into violence.

The set-to, which led to a man being punched in the face, was sparked when a group of people returned to their boat which was moored at Horning Village Marina.

It was about 11.30pm on Sunday, August 18 and the group - two men and a woman - saw another boat travelling along the River Bure.

They thought the boat was travelling too quickly and called to the man onboard to slow down, which led to an argument.

The man in the boat left the area, but he came back 10 minutes later accompanied by other men and a woman.

The row continued and a man, aged in his 50s, was punched in the face.

He fell to the floor and suffered bruising.

The victim' wife, also in her 50s, went to his aid and was pushed over. She did not suffer an injury.

Officers would like to hear from anyone who saw the assault or who has information about it.

Anyone who can help should contact PC Jon Parry at Broadsbeat on 101 or call Crimestoppers anonymously on 0800 555 111.