Nigeria's main opposition said Thursday it will present new evidence to support its court challenge seeking to overturn this year's presidential election, saying it can show the declared winner provided faked academic credentials to authorities.

President Bola Tinubu forged a diploma from an American university that he presented to Nigeria's election commission before the February vote and should be removed from office, first runner-up Atiku Abubakar and his lawyer alleged in a briefing with reporters.

They cited records obtained from the university in a U.S. court hearing and shared with The Associated Press.

Abubakar previously has argued Tinubu should not be president because the election commission did not follow due process in announcing the winner and Tinubu was not qualified to run, citing allegations of dual citizenship and of a criminal indictment in the United States.

Tinubu has denied those claims. He did not comment on the new allegation, but his spokesman denied it. 

"A man cannot forge the academic records he possesses," Temitope Ajayi, Tinubu's media aide, wrote on X, formerly known as Twitter.

The challenge is being closely watched by many Nigerians following a divisive election that saw Tinubu win with less than 50% of the votes, a first in Nigeria's history.

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