Polish PM vows to ‘catch the perpetrators, regardless of who their backers are’ after blast on track used for deliveries to Ukraine

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Poland’s prime minister, Donald Tusk, has described an explosion along a section of railway line used for deliveries to Ukraine as an “unprecedented act of sabotage” that could have led to disaster.

There were no casualties from the incident on the line from Warsaw to Lublin, but the consequences could have been catastrophic if the gap in the tracks had caused a train travelling at full speed to derail.