Four Nigerian peacekeepers killed in Sudan's Darfur
Violence in Darfur, where mostly non-Arab rebels took up arms against the government in Khartoum, has ebbed from a 2003-04 peak but international efforts to broker peace have failed to end the conflict
Four Nigerian peacekeepers killed in ambush in Sudan's Darfur
"They were killed last night some 2 kilometers from our regional headquarters in El Geneina. They came under fire from all sides" - spokesman
UNHCRs Guterres says global humanitarian crises at levels unmatched in recent history
Warns that UNHCR and other humanitarian actors are under increasing strain from a combination of simultaneous major new conflicts and unresolved old ones
ANALYSIS-Jonglei revolt gives South Sudan a security headache
Government disarmament campaign to halt tribal clashes criticised for abuses
Lack of jobs slows migration to African cities
With little work and high birth rates, urban areas may not be able to absorb climate migrants, experts warn
FACTBOX-Sudan and South Sudan border tensions
A look at the contentious border areas
The Fate of Sudan: An Overview
Author discusses the history and future of peace-building in Sudan and South Sudan