Satellite images show at least seven Russian warplanes destroyed in explosions Tuesday at an airbase in annexed Crimea.
This could be Moscow's largest loss of military aircraft in a single day since World War II, a CNN investigation found.
Ukrainian forces attacked an industrial site in the Russian-controlled city of Donetsk, causing a fire and an ammonia leak.
Elsewhere in the eastern region, pro-Russian separatist forces say they have entered the towns of Soledar and Bakhmut.
Ukraine accused Russia of bombing the Zaporizhia nuclear plant again on Thursday, a day after G7 nations demanded Moscow return full control of the site.
Ukrainian President Volodymyr Zelensky
