"The United States will continue to stand with Ukraine in their fight for freedom against Russia’s aggression, both now and into the future,” he said.
Ukrainian air defenses shot down all 10 cruise and ballistic missiles launched by the Kremlin’s forces, but falling debris wounded 16 people.
The attack came as Ukrainians prepared to mark the anniversary of Kyiv's founding on Sunday. The timing was likely not coincidental, officials said.
Most of the missiles were shot down, and one death was reported from the attacks.
On the last day of the year marked by the brutal war, many Ukrainians returned to the capital to spend New Year’s Eve with their loved ones, despite the ongoing Russian attacks.
The Kyiv city administration said more than 20 Iranian-made drones were detected over the capital's air space and at least 15 of them were shot down.
The concentrated use of the kamikaze drones was the second barrage in as many weeks — after months in which air attacks had become a rarity in central Kyiv.
Residents awoke to air raid sirens for the fourth morning in a row following Russia’s massive, deadly assault across the country on Monday.
Russian airstrikes targeting civilians across Ukraine have left many dead and injured, in retaliation for the destruction of a key bridge linking Russia and Crimea.
The sustained barrage on major cities marked a major surge in the war amid a successful Ukrainian counteroffensive in recent weeks.