Nigeria's All Progressives Congress (APC) on Tuesday told AFP that President Goodluck Jonathan had conceded the general election to Muhammadu Buhari.
"President Jonathan called at 5:15 (1615 GMT)," Buhari's campaign spokesman Shehu Garba said. Asked if Jonathan conceded, he said: "Yes, and General Buhari has accepted and thanks him for this."
There was no immediate comment from Jonathan, his spokesman or the People's Democratic Party (PDP).