KYIV -- Ukrainian President Volodymyr Zelenskyy kept up his call for additional Western pressure on the Kremlin as the death toll rose from the latest Russian attacks and as authorities struggled to restore power following strikes on Ukraine's energy infrastructure.

State energy provider Ukrenergo said power would be reduced in most regions for eight to 16 hours on November 9 while repairs were made to the system and supplies were rerouted. The cuts would affect the capital, Kyiv, it said, among other major cities.

Ukrenergo urged customers to "please consume it sparingly" when power was available following the attacks early on November 8.

"The enemy inflicted a massive strike with ballistic missiles, which are extremely difficult to shoot down. It is hard to recall such a number of direct strikes on energy facilities since the beginning of the invasion," Svitlana Grynchuk told Ukrainian media.

Zelenskyy, in his nightly video address late on November 8, urged Kyiv's Western allies to respond to Russia's attacks with further sanctions on Moscow and weapons for Ukraine.

"Pressure on Russia is still insufficient," he said.

"Any [further] weakening...only encourages [Russian President Vladimir] Putin to prolong the war, inflict more damage on our country, our people, and others around the world," he added.

Ukrainian authorities said the death toll from the November 8 attacks had risen to seven, while energy infrastructure in multiple regions had been damaged by Russian drone and missile strikes, sparking emergency power outages and blackouts affecting thousands of people.

"Russia once again targeted substations that power the Khmelnytskiy and Rivne nuclear power plants," Foreign Minister Andriy Sybiha said on Telegram.

"These were not accidental, but well-planned strikes. Russia is deliberately jeopardizing Europe's nuclear safety," he added while calling for an urgent meeting of the UN nuclear watchdog to respond to the "unacceptable risks."