Tensions are rising in Nigeria over economic and religious issues.
At least one person has been killed in protests over the removal of a government subsidy on fuel that has led to a doubling of prices.
Trade unions have called for a national strike and mass demonstrations to shut down oil production unless the move is reversed.
Nigerians are worried that the spiralling cost of fuel will have a serious impact on their living standards.
But a potentially much more serious problem is rising tension between the mainly-Christian South and militant Islamists centred in the North.
President Goodluck Jonathan has declared a state of emergency in parts of the North after the militant group Boko Haram killed more than 50 people in a series of bomb attacks on Christmas Day.
In one incident 37 Christians died in an explosion at a church on the outskirts of the capital Abuja.
The spread of the attacks southwards has raised fears of an escalation of sectarian and regional violence in Africa’s most populous country.