President Volodymyr Zelenskiy urged the U.S. to pile more pressure on Russia after its latest air attack on Ukraine cut heating to half of the capital and impacted substations the U.N.'s atomic watchdog said are vital for nuclear safety.

Putin and Netanyahu discussed developments in the Middle East and Iran in a phone call on Friday, Russia said.

Sergey Karaganov, a former adviser to Putin, warned that Russia could deploy nuclear weapons if it came close to defeat.

Russian President Vladimir Putin is among the world leaders who have been invited to join President Trump’s “Board of Peace” formed to implement the U.S.-brokered peace plan between Israel and