KYIV, Ukraine -- Russia fired more than 100 drones at civilian areas of Ukraine overnight, authorities said Monday, as the Kremlin dismissed the country’s transport chief after a weekend of travel chaos when Russian airports grounded hundreds of flights due to the threat of Ukrainian drone attacks.

Russia and Ukraine have exchanged hundreds of drone strikes, causing several deaths and significant disruptions

The Kremlin announced Monday that Russia's transport minister has been terminated. There wasn't any official reason given for why Roman Vladimirovich Starovoit was fired from his post, but he was immediately replaced by Andrei Sergeevich Nikitin,