Ukrainian President Volodymyr Zelenskyy is urging greater international pressure on Moscow following a deadly Russian missile strike that hit a Kyiv apartment building this week, killing 23 people.

A US national was among 14 people killed in deadly strikes on Kyiv overnight Tuesday, as the growing crisis in the Middle East forced US President Donald Trump to leave a key summit early and miss a key meeting with his Ukrainian counterpart.

It was the deadliest attack on the Ukrainian capital in almost a year, and came as Moscow has intensified air assaults on the city.