KYIV – More than 20 people were killed in a Russian missile strike on the Ukrainian city of Sumy on Sunday, the city’s acting mayor and Ukraine’s General Prosecutor’s Office said.

Two ballistic missiles struck the heart of the city at around 10:15 a.m. as people gathered to celebrate Palm Sunday, according to officials. Videos posted from the scene on official channels showed bodies on the ground amid debris and smoke around central Sumy.

“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.”

At least 21 people were killed and 34 were injured as a result of the enemy attack, including five children, the Prosecutor General’s Office said, citing initial investigation results.

Ukrainian President Volodymyr Zelenskyy confirmed that rescue efforts were ongoing and said “dozens” had been killed in the double missile attack.

“According to preliminary information, dozens of civilians were killed and wounded. Only filthy scum can act like this — taking the lives of ordinary people,” he said.

Zelenskyy also called for a global response to the attack. “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, underscoring the challenges of negotiating an end to the 3-year-old war.

The two countries’ foreign ministers spoke at separate events at the annual Antalya Diplomacy Forum, a day after U.S. envoy Steve Witkoff met with Russian President Vladimir Putin to discuss peace prospects.

“The Ukrainians have been attacking us from the very beginning, every passing day, maybe with two or three exceptions,” Russian Foreign Minister Sergey Lavrov said, adding that Moscow would provide the U.S., Turkey and international bodies with a list of Kyiv’s attacks during the past three weeks.

His Ukrainian counterpart, Andrii Sybiha, fiercely contested that claim, saying Saturday that Russia had launched “almost 70 missiles, over 2,200 (exploding) drones, and over 6,000 guided aerial bombs at Ukraine, mostly at civilians,” since agreeing to the limited pause on strikes.