Ukrainian President Volodymyr Zelenskyy on Sunday vowed stern retaliation for a Russian missile strike in the centre of the northern Ukrainian city of Chernihiv that killed seven people and wounded nearly 150 others the day before.

Ukrainian President Volodymyr Zelenskyy on Sunday vowed stern retaliation for a Russian missile strike in the centre of the northern Ukrainian city of Chernihiv that killed seven people and wounded nearly 150 others the day before.