A senior Russian lawmaker on Thursday said that Ukrainian strikes on Russia with Western missiles would lead to global war with the use of nuclear weapons and that Moscow's response would be tough with more powerful weapons.

"We think it lays out a strategy and a plan that can work," she said. Miller told a news briefing Blinken had learned about the plan during a visit to Kyiv and shared the ambassador's assessment. He said Ukrainian President Volodymyr Zelenskiy had said he looked forward to presenting the plan in detail to President Joe Biden.