Ukrainian President Volodymyr Zelenskyy confirmed that the Kaniv and Dnister hydropower plants in Ukraine were attacked in Russian strikes overnight.

"The terrorist country wants to repeat the environmental disaster in the Kherson region. But now not only Ukraine but also Moldova is under threat," Zelenskyy said on the Telegram messaging app.

The Dnister plant is on Ukraine's border with Moldova.

Zelensky had previously described Russia's attacks on Ukrainian energy infrastructure as "energy terrorism."

Meanwhile, Ukraine has announced emergency blackouts in three regions and was urging consumers to limit their electricity use.

"Ukrenergo's dispatch center is forced to apply emergency blackout schedules until the evening in the regions of Dnipropetrovsk, Zaporizhzhia and Kirovograd," the provider said in a statement, blaming "the massive Russian attack on Ukrainian power plants overnight."