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Concrete slabs were placed on railway tracks near Stoczek Łukowski in Poland's Lublin Voivodeship on Tuesday evening, causing two freight trains traveling in opposite directions to strike the obstacles. One of the trains was carrying fuel and reportedly came close to derailing.

The impact damaged the front scrapers of both locomotives, but neither train derailed and no injuries were reported. Rail traffic was suspended for several hours while emergency services secured the area and investigated the incident.

Poland issued an RCB Alert to residents across the Lublin Voivodeship amid a Russian attack on Ukrainian territory.

The alert states that the situation is being monitored and that Polish military aviation is operating in Polish airspace.