Former military ruler Muhammadu Buhari has become the first opposition candidate to win a presidential election in Nigeria.
Gen Buhari beat incumbent
Goodluck Jonathan by more than 2.5 million votes, final results showed.
Mr Jonathan telephoned his
rival to concede defeat. Gen Buhari's supporters took to the streets to
celebrate.
Observers have generally
praised the election, though there have been allegations of fraud.
"I promised the
country free and fair elections. I have kept my word," Mr Jonathan said in
a statement.
He said he had conveyed his
"best wishes" to Mr Buhari, and urged "those who may feel
aggrieved to follow due process... in seeking redress".
