President Muhammadu Buhari has taken an early lead as votes are being counted in Nigeria’s general election, amid allegations of manipulation.
Mr Buhari has won seven of Nigeria’s 36 states, while his rival Atiku Abubakar took four states and the capital Abuja.
As results came in, Mr Abubakar’s People’s Democratic Party (PDP) alleged that there had been irregularities in the vote.
Party chair Uche Secondus called the count “incorrect and unacceptable”.
He said there had been an “attempt by the government and other agencies to manipulate the result”, but did not give any evidence.
The EU, US and African Union have all expressed concern about delays and logistical problems with voting on Saturday, but no independent observers have suggested fraud.