Polish Foreign Minister Radoslaw Sikorski says he is "sure" that Russian drones flying into Poland were "planned", after Nato and Polish aircraft shot down drones that entered its airspace during overnight attacks on Ukraine. Speaking to journalists, he says: "Russian drones have veered into Polish airspace before - not just drones but also cruise missiles." "When one or two drones does it, it is possible it was a technical malfunction. But there were 19 breaches and it simply defies imagination that is was accidental." He adds that the "mass use of drones is a threat to all of Nato" and "we need to create a drone wall", echoing earlier comments by EU President Ursula von der Leyen who also called for a drone wall.