A former Nigerian oil minister and three election officials have
been charged with money-laundering.
The ex-minister, Diezani Alison-Madueke, has been accused of
bribing the officials before the 2015 elections. She was not present to
enter a plea, and was described on the charge sheet as being at large.
In the past she has rejected accusations that she was corrupt.
Ms Alison-Madueke served under President Goodluck Jonathan. He lost the election to Muhamadu Buhari.