Russia-Ukraine war: List of key events, day 1,222

Russia launched its biggest aerial attack on Ukraine since the beginning of its full-scale invasion overnight on Sunday, firing a total of 537 aerial weapons, including 477 drones and decoys and 60 missiles, according to the Ukrainian air force. Ukrainian forces intercepted 475 of the weapons, but the military said F-16 pilot Lieutenant Colonel Maksym Ustimenko was killed "while repelling" the "massive enemy air attack". At least four others were also killed in the air raids, in Kherson, Kharkiv, Dnipropetrovsk and Kostiantynivka regions, the Associated Press news agency reported, citing local officials. The aerial attacks were also far-reaching, targeting regions as far away as Lviv, in the far west, where a drone attack caused a large fire at an industrial facility in the city of Drohobych, and cut electricity to parts of the area. Poland said it scrambled aircraft, together with other NATO countries, to ensure the safety of Polish airspace during the attack.