Kyiv accused Moscow of breaching its own ceasefire on Thursday, saying Russian forces struck hundreds of times along the front lines and launched guided bombs that killed and wounded civilians in several Ukrainian cities.

Ukraine has discussed ways to pressure Russia into agreeing to a 30-day ceasefire with U.S., French, British and German senior officials, President Volodymyr Zelenskiy's top aide said on Thursday, part of a flurry of diplomacy to try to end the war.

Ukrainian officials say Russia has struck northeastern Ukraine in the opening hours of a 72-hour ceasefire called by Russian President Vladimir Putin, killing one person