The United Nations and international aid groups said Friday that up to 146,000 people have fled their homes amid fresh fighting in the disputed border region between North and South Sudan.
The U.N. aid coordination office said some 30-40,000 people have fled Kadugli, the capital of South Kordofan state, where the north's Sudan Armed Forces clashed with elements of the south's Sudan People's Liberation Army on Thursday.
The fighting included aerial bombardments by the SAF, said U.N. spokeswoman Elisabeth Byrs. Aid agency offices in Kadugli have been looted and most local and international aid staff have fled the area, she said.
Meanwhile, the International Organization for Migration says a further 106,000 people are displaced around Abyei, to the southwest of Kadugli.
Fighting has also reached the northern parts of Unity State, in South Sudan, Byrs said.
Humanitarian agencies working in the region warned that delivering aid will become significantly harder once the rainy season starts, as many roads and airstrips will become unusable.