Romania scrambled fighter jets on Saturday when a drone breached the country's airspace during a Russian attack on Ukrainian infrastructure near the border, the defence ministry said. A threat of drone strikes also prompted Poland to deploy Polish and allied aircraft and close an airport in the eastern city of Lublin, three days after it shot down Russian drones in its airspace with the backing of aircraft from its NATO allies. Romania, a European Union and NATO state which shares a 650-km (400-mile) border with Ukraine, has had Russian drone fragments fall onto its territory repeatedly since Russia began waging war on its neighbour. On Saturday, it scrambled two F-16 fighter jets and warned citizens in the southeastern county of...