DUBAI - Islamic State has issued a video showing the beheading of what it described as a Russian intelligence officer captured in Syria, the US-based SITE monitoring website reported on Tuesday. The Russian Defense Ministry and the FSB security service were not immediately available for comment. The 12-minute Russian-language video, released on the day Russia celebrates the anniversary of the 1945 victory over Nazi Germany with military parades, showed the man dressed in a black jump suit kneeling in a desert scene and urging other Russian agents to surrender. 'This idiot believed the promises of his state not to abandon him if he was captured,' he said before a bearded man beheaded him with a knife.