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.

Israel launches airstrikes on south Lebanon
Voting ends in first phase of election in India's Bihar
Britain's Prince William calls for optimism on environment at EarthShot Prize event
Afghanistan and Pakistan return to Istanbul for more peace talks
Groping of Mexico's president puts violence against women in spotlight