Ukraine accused the Kremlin on Saturday of using the same "genocidal" tactics that it used against it in the 1930s under Josef Stalin as Kyiv commemorated a Soviet-era famine that left millions of Ukrainians dead during the winter of 1932-33.

Ukraine's memorial day for the victims of the "Holodomor" famine comes this year as it grapples to repel Russian forces and deal with massive power outages across the country after waves of Russian air strikes on vital infrastructure.

"Once they wanted to destroy us with hunger, now – with darkness and cold," President Volodymyr Zelensky wrote on his Telegram channel. "We cannot be broken."

In November 1932, Soviet leader Stalin dispatched police to seize all grain and livestock from newly collectivised Ukrainian farms, including the seed needed to plant the next crop.

Millions of Ukrainian peasants starved to death in the following months from what Yale University historian Timothy Snyder calls "clearly premeditated mass murder".

"The Russians will pay for all of the victims of the Holodomor and answer for today's crimes," Andriy Yermak, the head of Ukraine's presidential administration, wrote on Telegram.

Russia has targeted critical infrastructure across Ukraine in recent weeks through waves of massive air strikes that have sparked widespread power outages and killed civilians.

Millions of Ukrainians were still without power after fresh strikes this week, Zelensky said late on Friday.

The Kremlin has denied that its attacks, which have only galvanised Ukrainian public anger, were aimed at civilians but said on Thursday Kyiv could "end the suffering" by meeting Russia's demands to resolve the war.

In a statement on Saturday, Ukraine's foreign ministry accused Moscow of reviving the tactics of the 1930s.

"On the 90th anniversary of the 1932-1933 Holodomor in Ukraine, Russia's genocidal war of aggression pursues the same goal as during the 1932-1933 genocide: the elimination of the Ukrainian nation and its statehood," it said.

"The political and ideological narratives of the Stalinist era, in particular presenting the image of the so-called 'hostile West' and the denial of the existence of Ukraine as an independent state, are actively reproduced today," the statement added. (Reuters)