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.
Gatwick Airport reopens terminal following security alert
London's Gatwick Airport, the second busiest in Britain, reopened a terminal on Friday after a security alert earlier in the day forced its evacuation and caused travel disruption for thousands of people.
Pro-Palestinian NGOs sue Dutch government over Israel support
Ten Pro-Palestinian groups took the Dutch state to court Friday, urging a halt to arms exports to Israel and accusing the government of failing to prevent what they termed a genocide in Gaza.
London's Gatwick Airport evacuates terminal due to security incident
British police sent a bomb disposal team to London's Gatwick Airport after a suspected prohibited item was discovered in luggage, authorities said on Friday, following the earlier evacuation of a passenger terminal.
Monitor: Toll from Israeli strikes on Syria's Palmyra rises to 92
A Syria war monitor said on Friday that Israeli strikes on the city of Palmyra this week killed 92 pro-Iran fighters, after a United Nations representative said they were likely the deadliest to date.
Israeli strikes kill 52 people in Lebanon
Lebanon said Israeli strikes on the country’s east and south killed 52 people on Thursday, as raids also hit south Beirut and Hezbollah claimed its deepest attack on Israel in over a year.
