NATO scrambled fighter jets in Polish and Romanian airspace overnight as Russia carried out massive drone and missile strikes in western Ukraine, killing at least 25 people, three of them children.

Prime Minister Donald Tusk says two Ukrainian citizens working for Russia are suspected of blowing up a railway line in Poland.

A full-scale invasion of Poland, in the manner Russia invaded Ukraine, is rather not viable, given Russia's current military capacities, Poland's military build-up and the collective defense guarantees of NATO membership, Michnik said, "however, this reality must not diminish Poland’s ongoing preparation."