A day before the split of Africa’s largest nation, Khartoum has become the first capital to recognise the independence of oil-producing South Sudan.
The breakaway has sparked celebrations for many southerners who see it as a moment of liberation after years of fighting and perceived repression.
Sudan entered its last day as a united country amid rumblings of conflict along its north-south border and international concerns about future stability.
On the eve of secession the UN Security Council voted to establish a new peacekeeping force for the underdeveloped south. A 2005 peace deal ended years of civil war between the two sides.