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.

Three injuries and material damage to a university building in Bahrain
Explosion hits US embassy in Oslo, causing minor damage, thick smoke
Four killed in Beirut hotel strike, Israel says it targeted Iranian commanders
Drone attacks cause major fire at Kuwait International Airport
Israel warns Lebanon of 'heavy price' as week's death toll nears 300
