Nigeria's Buhari wins big in northern states Kano, Kaduna
Buhari, a northern Muslim, also won by a wide margin in the biggest northern battleground state of Kano, with 1.9 million votes to Jonathan's 216,000, the final result showed.
Kano is a Buhari stronghold but was seen as one of the northern states where Jonathan had the best chance of making in-roads.
(Reporting by Bate Felix and Nnekule Ikemfuna; Writing by Tim Cocks; Editing by Ed Cropley)