Police have launched an investigation into a fight between a school bus driver and another motorist on the A47. 

Norfolk Constabulary responded to reports of an altercation between two men near the Brundall roundabout on Tuesday afternoon.

The force confirmed that a bus driver and another driver were involved in a verbal and physical altercation at 3.30pm, blocking the road for a short time. 

Norwich Evening News: The school children watched as their bus driver was thumped by the other manThe school children watched as their bus driver was thumped by the other man (Image: Supplied)A 33-second clip circulated after the incident showed Thorpe St Andrew pupils watching on in shock as their bus driver was thumped by the other man. 

The cause of the fight remains unconfirmed but a boy in the video clip can be heard saying "to be fair the other guy did pull out in front of him".

A Thorpe St Andrew High School spokeswoman said that the bus driver was not employed directly by the school and was instead employed by a company contracted by Norfolk County Council.

A spokeswoman for Norfolk County Council said that they are investigating the incident with the operator and "will deal with the incident appropriately".