Several European leaders, including those of Poland, have expressed outrage at the incursion of Russian drones into Polish airspace overnight on Wednesday.

Polish F-16s and Dutch F-35s, Italian airborne early warning aircraft, and a refueler from the North Atlantic Treaty Organization’s Multinational Mult-Role Tanker Transport aircraft fleet responded to the threat, NATO Secretary-General Mark Rutte said in brief remarks on Wednesday. German Patriot air defense systems in Poland were also put on alert.