A cholera outbreak has killed four children in northern Nigeria's Kaduna State, and 25 other people have been hospitalised in the past three days, a senior health official said.
Aminu Sabo, the health director in the Chikun region of the state, told Radio Nigeria on Saturday that the disease was caused by drinking contaminated and untreated water.
He said residents of the affected area had resorted to the open wells as a source of drinking water after their taps went dry for weeks.