Dmitry Kiselyov is a prominent propagandist for Russian President Vladimir Putin / Screenshot

Sergey Kiselyov, a nephew of Dmitry Kiselyov, a prominent propagandist for Russian President Vladimir Putin, has been serving his sentence in a German prison for participation in the war in Donbas, eastern Ukraine, on the side of the so-called "Donetsk People's Republic."

"He said, 'I am a Russian' and went to fight. His platoon commander died, he took command, so to speak, and was even awarded with some kind of a medal from Donetsk," Dmitriy Kiselyov told Yury Dud, a Russian sports journalist who also runs an unrelated YouTube channel vDud, where he interviews famous Russian figures.

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According to Kiselyov, his nephew has German citizenship and was arrested after he had left Ukraine.

"He went into convent, became a monk – he was somewhere in Bulgaria and the Bulgarians arrested him and deported to Germany. Now he is in prison, [serving his sentence] under a bad article – terrorism, [possession of] weapons because he was a mercenary," the propagandist confessed.