A court in the Nigerian capital, Abuja, has begun calling witnesses as it examines a petition against the victory of President Bola Tinubu in February’s election.
The opposition Labour Party says it is presenting additional material to support its argument that the poll was rigged.
Opposition lawyers are also submitting documents which they say show that Mr Tinubu made a settlement with the United States authorities after he had been investigated for involvement in drug trafficking.
He was never personally charged and has denied any wrongdoing.
Source: BBC