Separately, the Polish air force said it had scrambled military jets to protect its airspace in regions bordering Ukraine, as it usually does in the event of large scale Russian strikes.
Detailing the aftermath of the strikes, Synegubov said that in Kharkiv, a 65-year-old woman, a 40-year-old man, and a 13-year-old girl were among those killed.
The bodies of four more people were found, including a nine-year-old boy, he later said on Telegram.
Synegubov said seven apartment buildings were damaged as were power grids and an administrative building in the city.