"Unidentified" drones targeted the Kremniy-El plant, a major facility specializing in microelectronics for Russia’s military-industrial complex, said Andrii Kovalenko, an official at Ukraine's National Security and Defense Council.

A Russian drone hit a bus carrying workers in the Ukrainian city of Marhanets on Wednesday, killing nine people and injuring close to 50, Kyiv officials said, in an attack President Volodymyr Zelenskiy said was a "deliberate war crime".

A large-scale Russian missile and drone attack hit Kyiv overnight, killing nine people and injuring another 63, including six children, Ukrainian authorities said Thursday.