SUDAN'S army and a paramilitary force battled on Khartoum's outskirts, undermining a truce in their 11-day conflict, but the army expressed willingness to extend the ceasefire. The army late on Wednesday said its leader, General Abdel Fattah al-Burhan, gave initial approval to a plan to extend the truce for another 72 hours and send an army envoy to the South Sudan capital, Juba, for talks. The Sudanese armed forces and the paramilitary Rapid Support Forces (RSF) previously agreed to a three-day ceasefire that was due to expire late on Thursday. There was no immediate response from the RSF to the proposal…