Slaviansk, Ukraine (CNN) -- Do a series of photos of gun-toting men wearing green uniforms prove Russian forces are operating in eastern Ukraine? Ukrainian officials point to the pictures in a dossier obtained Monday by CNN, arguing that the images show Russian "sabotage-reconnaissance groups" acting in Ukrainian towns. The images, Ukrainian officials say, prove organized Russian activity in the region. CNN cannot independently confirm the photographs, some of which were first published in The New York Times. The dossier shows what Ukrainian officials say are images of well-equipped gunmen in eastern Ukraine who look similar to photographs of Russian forces taken in Crimea, Russia and during Russia's 2008 invasion of Georgia.
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CNN has heard @placeholder accents among the "men in green," as they are known, well armed and uniformed groups who have appeared in towns like Slaviansk and Kramatorsk.