Nigeria elections: Tension ahead of state polls
Voters in Nigeria go to the polls on Thursday to elect state governors and assemblies, as tension following the presidential election remains.
Divisions between the north and south of the country were laid bare in deadly rioting after last week's vote, which saw President Goodluck Jonathan re-elected.
International observers say the ballot was generally free and fair but supporters of runner-up General Muhammadu Buhari dispute that claim.
Caroline Duffield reports from Abuja.
21 Apr 2011