Ballots are being counted in Nigeria’s closely fought general election, although voting has been extended to a second day in a handful of places.

Due to logistical problems and some cases of violence, polls have been put back to a later date in a few areas.

President Muhammadu Buhari, 76, is seeking a second term. His main challenger is former Vice-President Atiku Abubakar, 72.

The election had been due last week but was delayed at the last minute.

Whoever wins in Africa’s most populous nation and largest economy will have to address power shortages, corruption, security threats, and an economic slowdown.

President Buhari cast his ballot in his hometown of Daura in the northern state of Katsina. Asked if he would congratulate his rival if he lost, he said: “I will congratulate myself.”