Russia bombarded Ukraine’s second-largest city with massive strikes in the early hours of Saturday, its mayor said, one night after Moscow carried out one of the war’s largest aerial assaults on Ukraine.

Russian forces have accelerated attacks on Ukraine in recent weeks, with the Kremlin vowing to retaliate over a brazen attack on its air bases last weekend.

Sharing further details of the large-scale assault, Ukrainian officials said that cruise missiles and hundreds of drones were launched targeting Kyiv, Chernihiv, Lutsk and Ternopil.