Muhammadu Buhari, the former president of Nigeria who led the country as both a military ruler after a coup and later as the elected president, has died at the age of 82, his family said.

Nigeria's President Muhammadu Buhari, who has died age 82 in a London clinic, was a former military ruler and self-styled converted democrat who returned to power through elections but struggled to convince Nigerians he could deliver on the change he promised.