An hour before he was kidnapped by pro-Russia forces, Simon Ostrovsky interviewed two Russian Cossacks in Kramatorsk. One man showed Simon his Russian passport, which was the first confirmation VICE has seen of Russians working with the separatists in eastern Ukraine.
Russia's War Against Ukraine
Vice: Russian roulette – the invasion of Ukraine (VIDEO)

Ukrainian soldiers march in the city of Kramatorsk in Donetsk Oblast.