KYIV, Ukraine (AP) — Loud explosions sounded above Kyiv early Tuesday as Russia launched an intense air attack on the capital using a combination of drones, cruise missiles and possible ballistic missiles.

Russia's latest attack on Kyiv was “exceptional in its density — the maximum number of attacking missiles in the shortest period of time,” said Serhii Popko, the head of the Kyiv Military Administration.

It is the eighth time this month that Russian air raids have targeted the capital, a clear escalation after weeks of lull and ahead of a much-anticipated Ukrainian counter-offensive. It also comes as President Volodymyr Zelenksyy concludes a whirlwind European tour to greet Ukraine's key wartime allies, which spurred an additional tranche of pledged military aid.

“According to preliminary information the vast majority of enemy targets in the airspace of Kyiv were detected and destroyed,” said Popko, without providing an exact number of missiles shot down.

Debris fell across several districts in the capital. In the Solomyansky district, the debris caused a fire in a non-residential building. The fire was extinguished.

Debris set cars on fire and fell on the grounds of a zoo, but no losses were reported, said Kyiv Mayor Vitali Klitschko.