Citizens are going to the polls today after a last-minute postponement earlier this week.
The main challenger to reigning president Muhammadu Buhari is former Vice-President Atiku Abubakar.
It is not known exactly when the final results will be announced.
Experts say a winner could be declared as late as Tuesday.
Nigeria is Africa's most populated country.
Ringleader of Wagner-directed UK arson on Ukrainian business jailed
The ringleader of an arson attack on Ukraine-linked businesses in London last year was on Friday jailed for 17 years for what prosecutors described as "a sustained campaign of terrorism and sabotage on UK soil".
Britain pushes allies to boost Ukraine support as Zelenskyy lands in London
Britain on Friday urged fellow allies of Ukraine to reach a deal to use frozen Russian assets to strengthen its hand for any future peace talks, as President Volodymyr Zelenskyy arrived in London for talks with those allies.
Erdogan says US, others must press Israel to abide by Gaza ceasefire
Turkish President Tayyip Erdogan said the United States and others must do more to push Israel to stop violating the Gaza ceasefire agreement, including the possible use of sanctions or halting arms sales.
EU vows financial backing for Kyiv
European Union leaders agreed on Thursday to meet Ukraine's "pressing financial needs" for the next two years but stopped short of endorsing a plan to use frozen Russian assets to fund a giant loan to Kyiv due to concerns raised by Belgium.
Tourists gawk and recoil at Trump's destruction of the White House East Wing
With many Washington tourist spots closed due to the US government shutdown, some visitors instead are checking out an unexpected and divisive new attraction in the nation's capital: President Donald Trump's surprise demolition of the White House's East Wing.
The Mohamed bin Zayed Foundation for Humanity will host a major pledging event in Abu Dhabi on December 8 to support global efforts to eradicate polio.
His Highness Sheikh Hamdan bin Mohammed bin Rashid Al Maktoum, Crown Prince of Dubai and the UAE's Deputy Prime Minister and Defence Minister, has congratulated the Emirate's first 16-member Student Council, calling them the "voice of Dubai".
His Highness Sheikh Khaled bin Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi, will be heading to South Korea to attend the Asia-Pacific Economic Cooperation (APEC) Summit.
