Ten people have been killed in an ambush of a convoy of south Sudanese civilians near the north-south border, a minister in the south has said, according to BBC. Internal Affairs Minister Gier Chuang said 18 people were hurt in Monday’s attack in South Kordofan, north of the border, by Misseriya Arab tribesmen. He said the civilians were returning home to vote in Southern Sudan’s ongoing independence referendum. Some 30 people reportedly died earlier in the nearby disputed Abyei area. Tuesday was the third day of the week-long referendum in Southern Sudan, with voters looking set to back independence.