Nigeria: A nation divided

Riots have broken out across northern Nigeria as presidential poll results show Goodluck Jonathan is set to win.

Homes of supporters of Mr Jonathan, the incumbent, were attacked in the cities of Kano and Kaduna.
Young supporters of Muhammadu Buhari, who is popular in the north, have been clashing with police and military.
They feel that the elections have been rigged in some areas of the south where there is a discrepancy between turnout and results.
With nearly all the votes counted, Mr Jonathan - a Christian from the oil-producing Niger Delta - has almost twice the number of his main rival.
The African Union observer team said it was Nigeria's best poll for decades.

The People's Democratic Party (PDP) has won all elections since the end of military rule in 1999. It won two-thirds of Nigeria's 36 states last time. To win at the first round, a candidate needs at least 25% of the vote in two-thirds of Nigeria's 36 states.