ROUGH CUT (NO REPORTER NARRATION)<br/> <br />STORY: Ukrainian border guards rebuffed attacks by armed pro-Russian separatists on Sunday (June 1) at a border post on the outskirts of the eastern Ukrainian city of Luhansk.<br/> <br />Video of the attack shows at least one rocket exploding at the base amidst the firefight.<br/> <br />Violence in the east intensified in the run-up to the May 25 election in Ukraine in which a first round win by Poroshenko, a confectionery magnate, gave the signal for a Ukrainian military offensive against the separatists.<br/> <br />Leadership in Kiev says Russian border authorities could do far more to stop these armed groups crossing into eastern Ukraine.<br/> <br />Moscow denies involvement in the conflict that threatens to tear Ukraine apart and has dragged ties between Russia and the West to their lowest ebb since the Cold War.
