BAUCHI, Nigeria (Reuters) – Twenty people, including children, were burnt to death after a public mini-bus collided with a car on a highway in northern Nigeria, the road safety agency said on Tuesday. “The accident was caused by a speed violation. A driver was injured, 20 were killed and burnt to ashes,” the Bauchi state command of the Federal Road Safety Corps (FRSC) said in a statement. In Africa’s most populous nation, many roads are poorly maintained and riven with potholes, leading to accidents that claim dozens of lives every year. (Reporting by Ardo Hazzad, Editing by MacDonald Dzirutwe…