From Washington, this is VOA News. Ukrainian troops killed in an ambush by Russian separatists. UN Syrian envoy Brahimi resigns. I'm Ray Kouguell, reporting from Washington. __________________Ukraine's Defense Ministry says a group of 30 rebels, whom it refers to as terrorists attacked the armored column in the outskirts of a village, 20 kilometers from the eastern Ukrainian city of Kramatorsk. UN Secretary General Ban Ki-moon meanwhile is calling for an end to undermining Ukraine's territorial integrity. 来自华盛顿,这里是VOA新闻. 乌克兰军队遭到俄分离分子伏击.联合国叙利亚特使卜拉希米辞职.我是雷`库格尔,从华盛顿发回报道. ____________________乌克兰国防部长声称,在距离乌克兰东部城市克拉马托尔斯克20千米的城镇郊区,一个由30名叛乱分子组成的队伍向装甲车队发动了恐怖袭击.与此同时,联合国秘书长潘基文呼吁停止破坏乌克兰的领土完整.