The U.N. reported that more than 120,000 people might have been affected in South Sudan 's Jonglei state after clashes between the Murle and Lou Nuer tribes have killed hundreds , possibly thousands . We could face food shortages and hunger in South Sudan , the U.N. says . Food supply lines into South Sudan have been blocked , the report says . South Sudan became independent from Sudan last year .
We could face food shortages and hunger in South Sudan , the U.N. says . Food supply lines into South Sudan have been blocked , the report says . South Sudan became independent from Sudan last year .