evidence: "I call on South Sudan to immediately withdraw its forces from Heglig. This is an infringement on the sovereignty of Sudan and a clearly illegal act. I also call on the Government of Sudan to immediately stop shelling and bombing South Sudanese territory and withdraw its forces from disputed territories, in particular Abyei. Both must stop supporting proxy forces against each other." [...] FILE – UNMISS - 13 APRIL 2012, JUBA, SOUTH SUDAN 13. Various shots, demonstrators carrying banners and flags gathered outside the United Nations Mission in South Sudan (UNMISS) compound in support of the seizure and occupation of the town of Heglig [...] Ban called on South Sudan to immediately withdraw its forces from the oil-producing region of Heglig in Sudan’s South Kordofan state, describing this as "an infringement on the sovereignty of Sudan and a clearly illegal act."