Abuja, Nigeria — Six Nigerian states withdrew a suit asking the Supreme Court to overturn the results of the recently concluded presidential election on Friday night, the latest twist in a series of challenges to the ruling party's victory in the vote.

According to court documents, the states, led by governors from the main opposition party, which finished second in last weekend's election, accused Nigeria's electoral commission of failing to follow its own rules and election laws in conducting the vote and announcing a winner.

The opposition claims that election results from the 176,000 polling units were not transmitted to the commission's portal.

However, in a joint notice of discontinuance filed on Friday night, the states withdrew the suit from the court. They did not provide an explanation for their decision to withdraw from the challenge.

Bola Tinubu of the ruling party won the election with 37% of the vote, which other candidates, including second-place finisher Atiku Abubakar and third-place finisher Peter Obi, have said they will challenge in court.

The states—Sokoto, Adamawa, Bayelsa, Akwa Ibom, Delta, and Edo — had asked the Supreme Court to rule that the presidential election results were "illegal, null and void, and of no effect whatsoever."

According to Nigerian electoral law, an election can be declared invalid only if it is proven that the Independent National Electoral Commission largely violated the law and acted in ways that could have changed the outcome. The Supreme Court has never overturned a presidential election result in Nigeria.

Lawyers said the latest court challenge was unique, citing a legal requirement that voting results be transmitted to the electoral body's portal.

"Because we did not comply with that requirement, I believe the entire process's integrity is questionable," said Inibehe Effiong, a lawyer in Nigeria's capital, Abuja. He added that, regardless of the precedent, the court has no other options.

Separately, the Supreme Court extended the government's deadline for replacing old currency with new bank notes until the end of the year. Because there aren't enough redesigned notes to go around in the cash-dependent country, the swap has resulted in a cash shortage. The crisis has resulted in riots, long lines at banks, and business closures.

The implementation of the program, according to a seven-member justice panel, violated the law, and the old banknotes of 200 naira (43 US cents), 500 naira ($1.08), and 1,000 naira ($2.16) will remain legal tender until December 31 before being replaced with the redesigned cash.

The central bank did not immediately respond to the court's directive. It has previously been accused of disobeying court orders.