Nigerian President Muhammadu Buhari has been re-elected for a second four-year term, the election commission says.
The 76-year-old defeated his main rival, former Vice President Atiku Abubakar, with a margin of nearly four million votes.
Mr Abubakar’s People’s Democratic Party (PDP) has rejected the result. Turnout was a record low at 35.6%.
Delays and violence marred the run-up to Saturday’s poll but no independent observer has cited electoral fraud.
Overall, the APC got 15.2 million votes while the PDP received 11.3 million.
Mr Buhari swept the north, while Mr Aububakar did better in the south and east.
The breadth and depth of corruption is so great, it affects so many aspects of public life that making serious inroads into the problem would require a focus, energy and application that was lacking in President Buhari’s first term.
The second problem he faces in fighting corruption is having the necessary political support. There is undoubted public backing but Mr Buhari’s party is compromised by senior members suspected of enriching themselves through graft. The fear is that across the board the looters will carry on pretty much as normal.
President Buhari also faces an array of security threats from clashes between farmers and herdsmen in the Middle Belt, continuing instability in the Niger Delta and – most worrying of all – a revived threat from Islamic extremists in the north of the country.
Some 130 people have been taken into custody suspected of electoral offences, reports say.
The initial vote was postponed early on 16 February, five hours before polls were due to open. Voters were also choosing members of the House of Representatives and Senate.