Last month, the Nigerian bank chief was involved in a helicopter crash in California, which killed six people.

Nigeria continues to search for nearly 300 schoolchildren taken in the northern town of Kuriga.

The levy, imposed last week, has been met with widespread condemnation from the private sector.

MMA fighter Francis Ngannou says he intends to continue in boxing despite a heavy loss to Anthony Joshua on Friday.

Twice in a week, gangs of motorcycle-riding armed men kidnapped hundreds of people in the north.