Clashes between rival ethnic groups in Sudan's South Darfur have left 47 dead, a local leader said yesterday, a day after over 80 people were killed in separate clashes elsewhere in the restive region.

The violence in the two states is some of the most significant fighting reported since the signing of a peace agreement in October, which observers hoped would end years of war.

While former rebel forces have committed to lay down their weapons, decades of conflict have left the vast western region awash with weapons and divided by bitter rivalries.

Key issues include land ownership and access to water.

It also comes just over two weeks since the hybrid United Nations African Union Mission in Darfur (UNAMID) ended operations in their long-running peacekeeping mission.

"The clashes between the Rizeigat tribe and the Fallata tribe have stopped, and we have now counted 47 deaths," local leader Mohamed Saleh told AFP.

Saleh, from the ethnically non-Arab Fallata people, added that several houses were burned in the attack.

The violence -- which erupted early yesterday -- came after the killing of at least 83 people in clashes between rival ethnic groups on Saturday and Sunday in Sudan's West Darfur state.