One of the tribal leaders said the clashes between the Arab Maaliya and Rizeigat yesterday seem to have been sparked by a livestock theft, nearly a year after fighting between the two groups left dozens dead.
"When cars pursuing the thieves stopped at an army checkpoint, they were shelled by artillery and one car was destroyed and another seized," said Murdas Jumaa, head of the Maaliya Shura council.
"Ten of our men were killed and another five wounded," he added.
"From our side, ten men were killed and the same number wounded," the source said.
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"Government forces were present in the area and did not intervene to break up the clashes," they said.
However, a member of the Rizeigat Shura Council, Mohamed Issa Aliu, said he could not give precise casualty figures but confirmed the group had suffered several members killed.
Aliu blamed the clashes on longstanding grievances between the tribes.
The two groups have a history of tensions over land ownership rights and allegations of cattle theft.
Darfur has been hit by conflict since 2003, when ethnic minority insurgents mounted a rebellion against President Omar al-Bashir, complaining that his Arab-dominated government was marginalising the region.
Bashir launched a brutal counter-insurgency and at least 300,000 people have been killed in the conflict, the United Nations says. Another 2.5 million people in the region have been forced to flee their homes.
Bashir is wanted by the International Criminal Court on war crimes charges related to Darfur, which he denies.