At least 133 people have been killed and more than 100 wounded in clashes between two groups belonging to an Arab tribe in West Kordofan State, a tribal leader said Thursday.

The clashes between the Awlad Omran and Al-Ziyoud groups of the Arab Mesiria tribe began with a dispute over land, said Mukhtar Babo Nimr, the leader of the tribe.

West Kordofan is the main oil-producing state in Sudan, and it borders Darfur region and South Sudan.