Omar al-Bashir, the Sudanese president, has warned the United Nations mission in Darfur and foreign aid organisations to "support government authorities" or face expulsion.

"Any aid group or UN or African Union agency, even Unamid, their mandate is to support government authorities," Bashir told a gathering of Darfuri leaders in Khartoum on Saturday.

Unamid, the joint African Union and United Nations mission in Darfur, has more than 15,000 peacekeepers deployed in the region.

"I tell my brothers, the governors of Darfur, that anyone who exceeds these boundaries or their mandate can be expelled the same day," Bashir said.