'This is a major escalation' Russia bombs Polish train line says PM Donald Tusk | Sean Bell

"Russia knows full well that there's lots of supplies coming to it from the West and inevitably wants to target that."

Bombing attacks on a Polish train and rail line into Ukraine is part of a Russian state attack according to the Polish government, Sean Bell explains why Russia would target the rail network and what the fallout could be on Frontline for Times Radio.

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