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.
Zohran Mamdani wins NYC mayoral race, capping meteoric rise
Zohran Mamdani, a 34-year-old democratic socialist, won the New York City mayoral race on Tuesday, capping a meteoric rise from a little-known state lawmaker to one of the country's most visible Democratic figures, and the first Muslim mayor of the largest US city.
Kalmaegi death toll climbs to 66 as Philippine survivors confront destruction
As the death toll from Typhoon Kalmaegi in the Philippines climbed to 66, residents in the hardest-hit province of Cebu are confronting the devastation it left behind: homes reduced to rubble, streets choked with debris, and lives upended.
At least 7 dead after UPS plane crashes in Kentucky, erupts into ball of fire
A UPS wide-body cargo plane crashed and erupted into a fireball shortly after takeoff on Tuesday from the international airport in Louisville, Kentucky, killing seven people, including all three aboard the aircraft, and injuring 11 others on the ground, officials said.
Former US VP Dick Cheney dies at 84
Dick Cheney, a driving force behind the US invasion of Iraq in 2003 who was considered by presidential historians as one of the most powerful vice presidents in US history has died at age 84, his family said in a statement on Tuesday.
Dozens killed, army helicopter downed as Typhoon Kalmaegi hits Philippines
The death toll from Typhoon Kalmaegi in the Philippines hit 46 on Tuesday, including six crew of a military helicopter that crashed during the powerful storm that unleashed heavy rains and floods across the central region.
