Sudanese government aircraft, army and militia attacked three towns in West Darfur state on Friday, causing heavy civilian casualties, Darfur rebels and witnesses said.
"The government attacked the town of Abu Surouj this morning ... a direct attack with cars and horses and bombardment," rebel Justice and Equality Movement (JEM) commander Abdel Aziz el-Nur Ashr told Reuters from Darfur.
"Now they have continued their aggression to three towns ... including Suleia." He put the initial death toll at around 200 but said it was hard to tell because the army was still there.
The governor of West Darfur state Abu el-Gasim confirmed the armed forces had moved on Sirba, Suleia and Abu Surouj - the last a city of some 150,000 people that also houses displaced people from other attacks - to retake them from the rebels.
But he denied any casualties or bombing.
"There were a few houses burned but no wounded and no civilians have been killed. I was following the situation carefully," he told Reuters.
Abu Surouj resident Malik Mohamed said he had escaped during the attack early on Friday. "First of all I saw two helicopters and Janjaweed on horses and camels, after that I saw cars," he said.
"The helicopters hit us four times and around 20 bombs were dropped," he said by telephone.
His voice breaking, he said he had no idea where his family was. "I am outside the city and can see burning. They (the attackers) are still inside."
Residents of el-Geneina, the state capital, told Reuters they could hear Antonov planes and had seen helicopters. Darfur rebels said that until the attacks they controlled the area north of el-Geneina, where they have often fought army troops, and which aid workers have been forbidden from entering.
Ashr had said previously the rebels expected the attacks because Khartoum had again mobilised militia groups, known locally as Janjaweed, in the area.
Yehia Abakr, a resident of Sirba, told Reuters by telephone he fled the town centre when the forces attacked.
"They have killed many people," he said.
