More than 100,000 Ukrainian homes have been left without power by the latest Russian drone attacks on energy infrastructure, Ukraine's President Volodymyr Zelensky has said.

The Poltava, Sumy and Chernihiv regions were affected, Zelensky stated in a post on Telegram.

Ukraine's energy ministry said it was a continuation of Moscow's policy of destroying civilian infrastructure ahead of winter. Last year, Ukraine said Russia had destroyed half of its electricity-generating capacity.

But more recently Ukrainian strikes have also hit Russian refineries and an oil depot.

In his post on Wednesday, Zelensky said Russia had carried out almost 100 drone attacks overnight. Energy facilities were the main targets, but a school in the Kharkiv region and a high-rise building in Kherson were also hit, he said.