New NATO Secretary-General Mark Rutte visited Ukraine on Thursday in his first official trip since taking office and pledging the alliance’s continued support for Kyiv in its war with Russia.

Rutte met with Ukrainian President Volodymyr Zelenskyy in Kyiv as air raid sirens twice went off in the Ukrainian capital.

The new head of NATO vowed when he took office on Tuesday to help shore up Western support for Ukraine, which has been fighting Russia’s full-scale invasion since February 2022 and has for most of this year been on the defensive due to a relentless Russian army push in the country’s eastern regions.