Aid agencies working in northern South Sudan are worried about refugees from Sudan's war-torn Blue Nile State who are reaching under-resourced camps in increasingly poor health. In recent weeks over 35,000 people have flocked to a site 50km from the border known as Kilometre 18 (KM18) by aid agencies - the distance to the nearest refugee camp (Jamam) holding over 30,000 people.

An 'exceptional' airlift of almost 12,000 South Sudanese ended with a final flight from Khartoum on Wednesday but thousands more continue to live in makeshift conditions while they, too, await transport to the South, officials said. One hundred Southerners took the last chartered plane from Khartoum to South Sudan's capital Juba, Jill Helke, chief of the International Organisation for Migration (IOM) in Sudan, said.

Top negotiators for Sudan and South Sudan met Tuesday 29 May for their first talks since deadly border fighting last month took them to the brink of war, even as Juba accused Khartoum of fresh air strikes. Teams from both sides are in the Ethiopian capital to restart the African Union-led talks which were stalled by heavy clashes last month, the worst fighting since the South won independence last July.