Nigerian President Muhammadu Buhari has been re-elected for a second four-year term.
Election officials said the former military dictator had defeated his main rival, former Vice President Atiku Abubakar, with a margin of just under four million votes.
Buhari secured 15.1 million votes, while Abubakar of the People's Democratic Party (PDP) received 11.2 million, with voter turnout at a meagre 35.6 per cent.
The opposition has rejected the results, claiming voter fraud and irregularities.

Global airlines race to fix A320 jets after Airbus recall
Death toll in Sri Lanka rises to 153 after Cyclone Ditwah
Hong Kong mourns victims of blaze that killed 128 and counting
Vast Russian overnight attack on Ukraine kills two, wounds dozens
Indonesia flood death toll climbs to 303 amid cyclone devastation