The U.N. Mission in Sudan said in a statement there have been heavy bombardments in the region in the past week. At least 11 bombs hit an airfield close to a U.N. camp early Tuesday.
The U.N. mission said the strikes by the warplanes often seemed indiscriminate and had inflicted suffering on civilians. Attempts to get humanitarian aid to the region also were impacted.
Fighting between forces of the northern government and soldiers of the Sudan People's Liberation Army from the southern semi-autonomous region, which is due to formally secede next month, has been ongoing across Southern Kordofan for more than a week.
The United Nations' World Health Organization said its office, warehouse and guesthouse in Kadugli, the capital of Southern Kordofan, were looted Friday. Drugs and other medical supplies worth $180,000 stolen, along with computers, office supplies, communications equipment, three vehicles and the staff's personal belongings, WHO spokesman Tarik Jasarevic told reporters in Geneva, Switzerland.