Russia launched scores of missiles and drones at Ukraine on Wednesday, targeting gas infrastructure and other energy facilities in western regions in a new barrage against the struggling power system in the depths of winter.

While the Norwegian jets are primarily in Poland to help defend a key logistics hub bringing materiel into Ukraine, rogue Russian missiles and drones have entered Polish airspace several times since the full-scale invasion began.

Russia's military on Tuesday said it would retaliate against Ukraine after Kyiv attacked Russian regions by firing six U.S.-made ATACMS ballistic missiles, six UK-made Storm Shadow cruise missiles and launching one of the biggest drone attacks to date.

Ukraine carried out its largest aerial attack on Russian territory of the nearly three-year war overnight, Kyiv said on Tuesday, hitting factories and energy hubs hundreds of miles from the frontline.