South Sudan's military spokesman said there is increasing tension at a United Nations camp in the rebel-held city of Bor because armed elements have entered the congested area, AP reported. Col. Philip Aguer said South Sudanese troops are outside Bor and will soon advance on the city. Bor is controlled by troops loyal to the country's former vice president. Aguer said troops will also soon advance on another rebel-held city, Bentiu, in the oil-rich region of Unity state.