KYIV, Ukraine — Ukrainian President Volodymyr Zelenskyy said Sunday Russia used the powerful hypersonic Oreshnik ballistic missile during a mass drone and missile attack on Kyiv on Sunday that killed at least two people, marking the third time the weapon has been used in the four-year war.

The intense aerial assault damaged buildings across the Ukrainian capital, including near government offices, residential buildings and schools.

The Oreshnik, which is capable of carrying nuclear or conventional warheads, struck the city of Bila Tserkva in the Kyiv region, Zelenskyy said in a post on Telegram. The target was not immediately clear.

Russia’s Defense Ministry on Sunday confirmed it used the Oreshnik, as well as other missile types, to strike Ukrainian “military command and control facilities,” air bases and military industrial enterprises. It did not specify where the targets were.

The ministry added the attack was retaliation for Ukrainian strikes on “civilian facilities on Russian territory”, without immediately giving detail.

Russian President Vladimir Putin on Friday denounced a drone strike on a college dormitory in Russian-occupied eastern Ukraine, which Moscow blames on Kyiv, and ordered the Russian military to submit its proposals for retaliation. He said there were no military or law enforcement facilities near the college.

The death toll from the strike in Starobilsk had risen to 21 as search-and-rescue operations closed, the press service of Russia’s Ministry of Emergency Situations said late on Saturday. It said 42 other people had been injured in the attack the previous night. The Kremlin-installed authorities of the Luhansk region announced two days of mourning on Sunday and Monday to honor the victims.

At a U.N. Security Council emergency meeting on the strike, held at the request of Russia, Ukrainian Ambassador Andrii Melnyk denied his Russian counterpart’s accusations of war crimes, calling them a “pure propaganda show” and asserting that the May 22 operations “exclusively targeted the Russian war machine.”

Ukraine and its allies have accused Russia of routinely targeting civilians and key civilian infrastructure since the early days of the war. The Kremlin denies this.

Russia says the Oreshnik is immune to any missile defense system

Russia first used the multiple-warhead Oreshnik on the Ukrainian city of Dnipro in November 2024. It was used a second time in January in the western Lviv region.

The latest combined attack included 600 strike drones and 90 air, sea and ground-launched missiles, according to Ukraine’s Air Force. Ukrainian air defenses destroyed and jammed 549 drones and 55 missiles. Around 19 missiles failed to reach targets, the Air Force said.

Earlier, Zelenskyy warned that Russia was planning to use the Oreshnik, citing intelligence from the U.S. and Western partners.

President Vladimir Putin earlier said the Oreshnik, which means “hazelnut tree” in Russian, streaks at 10 times the speed of sound, or Mach 10, and is capable of destroying underground bunkers “three, four or more floors down.”

The weapon travels “like a meteorite” and is immune to any missile defense system, Putin said, adding that several such missiles, even fitted with conventional warheads, could be as devastating as a nuclear strike.

Air raid sirens blared through the night as smoke billowed across the city from strikes. Associated Press reporters heard powerful explosions near the city center and close to government buildings.

Kyiv residents who have stayed until now consider relocating

Damage was recorded in 40 locations across several districts of the capital, including residential buildings, Kyiv military administration head Tymur Tkachenko said in a Telegram post.

“It was a terrible night, and there had never been anything like it in the entire war,” said Kyiv resident Svitlana Onofryichuk, 55, who had worked in the market that was damaged for 22 years.

“I am very sorry that I have to say goodbye to Kyiv now, I am not staying there anymore, there is no possibility,” she added. “My job is gone, everything is gone, everything has burned down.”

Yevhen Zosin, 74, a Kyiv resident who witnessed the attack, said the moment he heard the explosion he rushed to grab his dog.

“Then there was another explosion and she and I were thrown back like a pin by the shock wave. We both survived, she and I. My apartment was blown to pieces,” he said.

In Kyiv’s Shevchenko district, a five-story residential building was hit, which caused a fire, and one person was killed, Ukraine’s state emergency service reported.

A school building was damaged by an attack while people sheltered inside, Mayor Vitalii Klitschko said. Local authorities reported supermarkets and warehouses across the city also were damaged.

Multiple communities recorded damage throughout the Kyiv region, according to Mykola Kalashnyk, the regional governor.

Elsewhere, a Ukrainian drone killed a civilian in the Russian town of Grayvoron, in the Belgorod region bordering Ukraine, local authorities reported on Sunday morning.

Russia’s Defense Ministry said its forces shot down or jammed 33 Ukrainian drones overnight into Sunday, including over the Moscow region, western and southwestern Russia, and Russian-occupied Crimea.