thousands people in South Sudan are in urgent need of help , the United Nations says . They fled their homes last year to escape Some 60,000 of armed men from another tribe . A senior the United Nations official is visiting a town attacked by the fighters to assess the situation . Among them will be a refugee site in Mabaan , where tens of thousands of refugees have sought help since fleeing fighting across the border in Sudan 's Southern Kordofan and Blue Nile States . Ethnic tension flares as tribes fight over grazing lands and water rights .
thousands people in South Sudan are in urgent need of help , the United Nations says . They fled their homes last year to escape Some 60,000 of armed men from another tribe . A senior the United Nations official is visiting a town attacked by the fighters to assess the situation . Ethnic tension flares as tribes fight over grazing lands and water rights .