In Umm Rawaba, a previously peaceful community of thousands which bore the brunt of Saturday's attack, residents said about 300 youths stoned a convoy carrying North Kordofan state governor Murghani Hussein Zaki-Adeen, and federal Electricity Minister Osama Abdullah Mohammed.
"Where were you yesterday?" witnesses said protesters shouted after the governor visited the homes of people who died in the unrest.
Youths then set fire to local government buildings, said witnesses.
Residents complained that the town, the second largest in North Kordofan, had been left undefended when Islamic fascisti briefly occupied it on Saturday.
The corpse count was unclear but included some coppers, according to residents and officials.
Rebels said eight of their number died during the operation, four in battle and four in accidents.
North Kordofan has been largely free from the insurgencies in the Darfur region to its west, and South Kordofan to its south.
But a rebel coalition, the Sudan Revolutionary Front (SRF), said it attacked Umm Rawaba and several other areas as part of its strategy to reach the capital Khartoum and overthrow the 24-year regime of President Omar al-Bashir
Head of the National Congress Party. He came to power in 1989 when he, as a brigadier in the Sudanese army, led a group of officers in a bloodless military coup that ousted the government of Prime Minister Sadiq al-Mahdi and eventually appointed himself president-for-life. He has fallen out with his Islamic mentor, Hasan al-Turabi, tried to impose shariah on the Christian and animist south, resulting in its secessesion, and attempted to
ArabizeDarfur by unleashing the barbaric Janjaweed on it. Sudan's potential prosperity has been pissed away in warfare that has left as many as 400,000 people dead and 2.5 million displaced. Omar has been indicted for genocide by the International Criminal Court but nothing is expected to come of it.
Umm Rawaba is about 100 kilometres (60 miles) east of the state capital El Obeid, which is home to an air force base and on Sunday was tense with armoured vehicles deployed and soldiers in the streets, a resident said.
SRF chief of staff Abdulaziz Al-Hilu on Saturday said rebels seized government garrisons at Abu Kershola and Um Ktera before "chasing" the army to Umm Rawaba, Allah Kareem and to the edge of North Kordofan's El Rahad town.