A Russian missile strike on a Ukrainian city killed more than 20 people as civilians gathered to celebrate Palm Sunday, officials said.

Two Russian ballistic missiles struck the city of Sumy at around 10:15 a.m., according to Ukrainian officials. Images from the city show a building blasted to rubble, vehicles on fire in a street and several bodies on the ground.

“On this bright Palm Sunday, our community has suffered a terrible tragedy,” Acting Mayor Artem Kobzar said in a statement on social media. “Unfortunately, we already know of more than 20 deaths.”

An initial investigation determined at least 21 people were killed in the attack, the Prosecutor General’s Office said. At least 83 others were injured, including seven children, Minister of Internal Affairs Ihor Klymenko wrote on social media.

Zelenskyy also called on the U.S., Europe and all other countries around the world “who wants this war and killings to end” to “respond firmly” to the attack. 

Ruins of the regional human rights department building are seen following a Russian missile attack that killed at least 20 civilians in Sumy, Ukraine, on Sunday, April 13, 2025. (Ukrainian Parliament Commissioner for Human Rights Press Service via AP)

“Talks have never stopped ballistic missiles and aerial bombs. What’s needed is an attitude toward Russia that a terrorist deserves,” he said.

The strike comes less than a day after Russia and Ukraine’s top diplomats accused each other of violating a tentative U.S.-brokered deal to pause strikes on energy infrastructure.

The Associated Press contributed to this report.