Voters in Africa's most populous nation, Nigeria, are taking part in presidential elections against the background of militant Islamist violence.
Live updates as Nigerian voters go to the polls in a tight contest between incumbent President Goodluck Jonathan and Muhammadu Buhari.
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The authorities in Sierra Leone enforce a three-day national lockdown to curb the spread of Ebola, except for short windows to pray.
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A Liberian woman tells the BBC's Andrew Harding how her husband left her even though she survived Ebola.