Russia unleashed a major missile and drone attack on Kyiv early Friday, killing four people, starting fires and scattering debris across many districts of the capital, Ukrainian authorities said.

At least 27 people were injured as emergency crews responded to multiple strikes during the night, said Tymur Tkachenko, head of Kyiv's military administration.

At least 430 drones and 18 missiles were used in the attack across the country, Ukrainian President Volodymyr Zelenskyy said.

He said the attack, which also targeted Odesa in the south and Kharkiv in the northeast, was mostly aimed at Kyiv, where drones and missiles smashed into high-rise apartment blocks.

He added the Azerbaijan Embassy was damaged by fragments of an Iskander missile.

Moscow officials deny they target civilian areas, but Ukrainian officials dismiss that claim.

Fifteen people were hospitalized, including one man in critical condition and a pregnant woman, after a series of powerful explosions sounded in the city and air defenses were activated.

"I got up, got dressed, went out, and there was an explosion," said 59-year-old Oleh Hudyma, a resident of a damaged building.

"I didn't hear anything, I just realized that my hair was on fire," said another resident, Mariia Kalchenko.

"I realized that I couldn't see anything... I turned around and saw that there was no wall, and there was a neighbor's apartment. The neighbor was screaming, there was no door, and the flames were going from the front door into the apartment," she added.

City authorities warned that power and water outages are possible.

The strikes came as European Union officials warned this week that Ukraine must continue to crack down on corruption following a major graft scandal that has put top nuclear energy officials under scrutiny.

But they also offered assurances that aid will continue to flow as Kyiv strains to hold back Russia’s invasion.