UNITED NATIONS, July 11, 2016 (Xinhua) -- United Nations Secretary-General Ban Ki-moon addresses the press on the on-going situation in South Sudan, at the UN headquarters in New York, the United States, July 11, 2016. UN Secretary-General Ban Ki-moon on Monday condemned the killing of two Chinese peacekeepers in renewed fighting between South Sudan's rival army factions in capital Juba. (Xinhua/Li Muzi)