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Two Russian oil refineries have been hit in apparent Ukrainian drone strikes. Sky News defence analyst, Prof Michael Clarke, says the attacks are aimed at damaging Russian infrastructure ahead of the expected offensive by Ukraine. #ukraine #russia #nuclear

Defence and security analyst Michael Clarke explains where Russia is likely to direct its forces next, following Ukraine's rapid offensive in the Kharkiv region. #Ukraine #Russia #SkyNews SUBSCRIBE to our YouTube channel for more videos: http://www.