South Sudan rebels Tuesday attacked the capital of the state that is home to the country’s only functioning oil fields, further fraying a tattered cease-fire and threatening to choke off a trickle of crude exports from the beleaguered nation. The attack on Malakal, the capital of South Sudan’s Upper Nile State, ended a lull in fighting that had lasted nearly a month. It also came as rebels and government representatives failed to restart peace talks aimed at ending the nearly three-month-old conflict. The two sides remain far apart on important issues, such as the release of prisoners and Uganda’s military support for the South Sudanese government. Early Tuesday, heavily armed rebel fighters loyal to South Sudan’s former vice president, Riek Machar, attacked with machine guns and heavy artillery in a surprise assault, government military spokesman Col. Philip Aguer said. The ambush forced government troops to retreat northward, toward […]