May 24 (UPI) — Russia launched a series of a drone and missile attacks on Ukraine overnight, hitting the capital and killing at least four people, Ukrainian President Volodymyr Zelensky said Sunday.

The BBC reported the strikes included hundreds of drones and dozens of missiles that hit Kyiv and surrounding areas, including Bila Tserkva, injuring about 100 people. The attacks damaged residential buildings, schools, a water supply facility, a market, an opera house and a museum.

Both the BBC and The Guardian reported that Russia used the hypersonic Oreshnik ballistic missile in the attack. The Russian defense ministry confirmed the use of the missile for the third time since the Russian invasion of Ukraine in 2022.

Zelensky, who visited some of the damaged sites Sunday, posted on Telegram that the Ukrainian military wasn’t able to intercept all of the ballistic missiles launched by Russia.

“They are genuinely deranged,” Zelensky said of Russia’s attack on civilian locations.

“It is important that this does not pass without consequences for Russia.”

The Russian defense ministry said the attack was in retaliation for Ukraine’s own strikes on “civilian facilities on Russian territory.”

A Ukrainian drone hit a Russian dormitory at Luhansk Pedagogical University on Saturday, killing at least 18 people in Starobilsk, Russian President Vladimir Putin said. The Ukrainian military, though, said it hit a military drone unit.