Polish and allied aircraft were deployed in a "preventive" operation across Poland's airspace on Saturday, prompting the temporary closure of Lublin airport, amid concerns over potential drone strikes in neighbouring Ukrainian regions.

NATO allies Poland and Romania both scrambled fighter jets to respond to Russian drone and missile attacks in Ukraine on Saturday, as the alliance looks to bolster its defensive options in response to repeated violations of allied airspace by Russian munitions.

Long-range drones struck the Russian port of Primorsk, setting a ship and a pumping station on fire. Oil prices initially jumped on the news.