At least 21 people were killed on Monday when a speeding bus overturned in southern Zimbabwe, state radio reported.

The bus had been travelling towards Beitbridge, a town on the border with South Africa, when the accident happened around 2am.

The radio quoted witnesses as saying that the driver, who died at the scene of the crash, had been speeding and failed to negotiate a curve.

Accidents are common in Zimbabwe because of roads which have been neglected for years and are riddled with crater-like potholes. – Sapa-AFP