
Thirty people were killed in Ukraine after two buses were struck in Kramatorsk, prompting President Volodymyr Zelensky to vow that the attack will not go unanswered.
The strikes followed a separate attack in Pryluky that killed 22 people, including five young children, amid intensifying long-range bombardment by Russian forces.
Ukrainian negotiators are traveling to the United States for scheduled talks on Friday and Saturday with a US team and invited European officials.