In Nigeria, President Goodluck Jonathan says that the post-election violence “was not a spontaneous reaction”. The Red Cross says that tens of thousands of people have fled the fighting.
Nigeria is divided culturally, ethnically and linguistically between the mainly Muslim north and the mainly Christian south. Jonathan is from the south whilst his presidential rival Muhammadu Buhari is from the north.
There were riots in the north after Jonathan emerged as the winner of the presidential election.
International observers said that the vote was reasonably free and fair but Buhari disputes this and has so far failed to call for an end to the violence.
He said: “Human beings are not donkeys, if you uncover that you have subverted their will, they will react.”
Observers estimate that at least 200 people have died since the elections and thousands have been wounded or arrested.