The winner of Nigeria's presidential election, Muhammadu Buhari, has issued a defiant vow against militants Boko Haram, saying they would "soon know the strength of our collective will". The president-elect also vowed to tackle corruption, which he described as an "even greater evil". Gen Buhari won the election beating President Goodluck Jonathan by 2.5 million votes. World leaders congratulated Gen Buhari and hailed Nigeria's democratic spirit.
Gen Buhari, of the All Progressives Congress (APC), has become the first opposition candidate to win a presidential election in Nigeria.
In a televised speech, he said: "In tackling the insurgency, we have a tough and urgent job to do. Boko Haram will soon know the strength of our collective will. We should spare no effort until we defeat terrorism."