A Nigerian court in the 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.
The presidential candidate of the (PDP) Atiku Abubakar says he intends to call 100 witnesses to prove his case against Bola Tinubu’s victory as Nigeria’s president-elect.
Mr Tinubu also says he is prepared to defend his victory with 39 witnesses in Atiku’s case – one of the three petitions challenging the president-elect’s success at the 25 February presidential election.
The lawyers to the parties gave the outlook of the make-up of their witnesses at the Presidential Election Court in Abuja on Saturday.