An investigation is now under way into the cause of the crash, which happened on Lowery Road in Stanley, close to the village of Craghead, just after noon.

Four people were taken to the University Hospital of North Durham as a precaution, Durham Police said, but no one was seriously injured.

Officers closed the road while recovery specialists attempted to bring the bus upright, with members of the public urged to avoid the area.

Officers were assisted by North East Ambulance Service (NEAS) paramedics, who were called at around 12.30pm. A spokesman told Sky News they treated eleven patients at the scene.

They were joined by the County Durham and Darlington Fire and Rescue Service.

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Transport operator Go North East confirmed there had been no serious injuries.

Business director Ben Maxfield said: "Shortly after midday we were made aware that one of our buses was involved in an incident outside of Craghead village.

"Our management team were at the scene quickly and are working with emergency services to investigate the cause.

"We are supporting all those involved in the incident and will continue to provide updates."