Blasts shook Ukraine's capital Kyiv and other cities while neighboring Poland scrambled its air force early on Sunday after the two countries said a Russian missile attack was under way. "Due to the massive attack by the Russian Federation using cruise missiles, ballistic missiles and unmanned aerial vehicles on objects located, among others, in western Ukraine, Polish and allied aircraft have started operating in our airspace," the operational command of NATO member Poland's armed forces posted on X. Blasts were heard in Ukraine's southeastern city of Zaporizhzhia and the Black Sea port of Odesa, Reuters witnesses said, and Ukraine's air force issued air raid alerts for all of the country., although the scale of the attack was unclear. The air force urged residents to take cover and said a number of missiles, including different types of cruise missile, were flying through Ukrainian air space. Ukrainian officials said they had cut power to a number of regions, including Kyiv, as a preventative step.