The violence erupted on Saturday in South Darfur's Kalma camp, one of the biggest facilities housing thousands of people displaced by war.
"Fourteen people have been killed in clashes inside camp Kalma the day before yesterday," South Darfur's acting governor General Hashim Khalid said, quoted by SUNA.
He did not say what triggered the violence or reveal details about the groups that clashed, but said the camp has "lot of weapons and groups that disturb the state's security".
He said camp Kalma also had many rebels from the Sudan Liberation Army-Abdul Wahid (SLA-AW), one of the groups fighting with Khartoum for years.
Darfur, a region the size of France, has been awash with weapons since 2003, when ethnic minority rebels took up arms against ousted leader Omar al-Bashir's Arab-dominated government, accusing it of economic and political discrimination.
Khartoum cracked down on rebels and insurgent groups have fragmented, with fighting punctuated by periods of relative calm.
During the initial years of the conflict, Arab militias fought alongside government forces against the African rebels.
The most feared government-allied militia was the Arab Janjaweed - gunmen on horseback who swept through Darfur marauding villagers and fighting rebels.
Sudan restricts international media access to Darfur, so it is not possible to independently verify the details of fighting there.
In recent years the level of violence has significantly dropped, with Khartoum insisting the conflict has ended.
The United Nations says about 300,000 people have been killed in Darfur since 2003 and another 2.5 million people displaced.
Tens of thousands of people continue to live in sprawling camps like Kalma.
Bashir is wanted by the Hague-based International Criminal Court for alleged war crimes and genocide in Darfur. He denies the charges.
A permanent peace between Khartoum and the Drafur rebels has proved elusive.
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