SSudan: tension after the killing of tribal chief The tension is palpable in Abyei, a region claimed by both South Sudan and Sudan, after fighting that killed a tribal chief and a UN peacekeeper. Following the killing of the Paramount Chief Kuol Deng Kuol, a man known as a peace maker, some Dinka Ngok have become hostile to the AU led peace process and there is talk of return to arms. Images and soundbites