Poland suspects Russian intelligence services were behind an explosion on a major Polish railway line used to transport military goods and aid to Ukraine, an act Prime Minister Donald Tusk called an "unprecedented act of sabotage."

The weekend blast caused considerable damage to the Warsaw-Lublin railway line in eastern Poland, which borders both Ukraine and Russia and serves as a major logistics hub for aid.

Polish authorities are investigating what they describe as one of the most serious sabotage incidents on the country’s railway network in recent years, with officials pointing to two Ukrainian nationals allegedly acting on behalf of Russian intelligence. The case has unsettled Warsaw, which sees the Warsaw Lublin route as a strategic corridor for moving aid to Ukraine.

Poland investigates a suspected Russian sabotage of a railway line crucial for Ukraine aid, raising national security concerns.

Poland has identified two people responsible for an explosion on a railway route to Ukraine, Prime Minister Donald Tusk said on Tuesday, adding that they were Ukrainians who collaborated with Russian intelligence and that they had fled to Belarus. The blast on the Warsaw-Lublin line, which connects the Polish capital…

A segment of a rail line linking Poland's capital, Warsaw, to the border with Ukraine was blown up over the weekend. Prime Minister Donald Tusk called it an "unprecedented act of sabotage".