Ten civilians were killed, among them two children, when rebels shelled the main city of the oil-producing South Kordofan state on Tuesday, the Sudanese army said.
Army spokesperson al-Sawarmi Khalid told Reuters rebels had shelled an army garrison outside Kadugli but some shells had landed inside the city.
He said the army had launched an operation to "cleanse" the areas of rebels outside Kadugli a few days ago, without giving details.