Nigerians waited Monday for election officials to count ballots and announce the result of two days of voting to decide the country's president.
Nigeria's Independent National Electoral Commission (INEC) said late Sunday that it would begin at midday Monday the process of collating, or pulling together the vote totals from states.
To win the election without a runoff, a candidate needs a majority of the nationwide vote while also securing at least 25 percent of the ballots in two-thirds of the country's 36 states and the capital.
President Goodluck Jonathan, who has been in office since 2010 and whose Peoples Democratic Party has held the presidency since 1999, is facing a challenge from former military ruler Muhammadu Buhari from the All Progressives Congress.
The election was supposed to be held solely on Saturday, but voting was extended into Sunday because of delays caused by technical problems.