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.

U.S. President Donald Trump called on Thursday for a 30-day unconditional ceasefire between Russia and Ukraine, warning that Washington and its partners would impose further sanctions if the ceasefire is not respected.

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