Vassily Nebenzia (C, front), Russian permanent representative to the United Nations and president of the Security Council for the month of September, chairs a Security Council meeting on the situation in Yemen, at the UN headquarters in New York, Sept. 16, 2019. The top UN envoy for Yemen Martin Griffiths on Monday warned that the attack on Saudi oil facilities may drag Yemen into "a regional conflagration." (Xinhua/Li Muzi)