Russia fired one of its biggest missile barrages of the war at Ukraine on Friday, killing 31 civilians, wounding over 120 and hitting residential buildings in Kyiv, the south and west of the country and a maternity ward in the east, officials said. NATO member Poland said a Russian missile appeared to have flown into its airspace for some 40 km before returning to Ukraine under three minutes later. There was no immediate comment from Moscow and NATO said it remained "vigilant".