Russia pounded Ukraine's capital of Kyiv with missiles on Monday, while officials said falling debris from the downed weapons injured at least two people, sparking fires and damaging homes and infrastructure.

Ukraine's air defence units destroyed more than 10 cruise missiles and nearly 10 ballistic missiles, Kyiv's military administration said.

Air raid alerts went out across Ukraine for nearly two hours before the air force declared the skies clear. Neighbouring NATO member Poland activated Polish and allied aircraft to keep its airspace safe during the attacks.

A boiler house at a Kyiv water plant was partially damaged as was the entrance to a metro station doubling as a bomb shelter in the Svyatoshynksyi district, Kyiv's Mayor Vitali Klitschko said on the Telegram messaging app, though the station still operates.

The district is home to a cluster of universities and schools.

Emergency services also went to the districts of Svyatoshynksyi, Holosiivskyi, and Solomyanskyi, where debris fell from destroyed missiles, Klitschko added.

Solomyanskyi is home to a major train station and Kyiv's main airport. The historic neighbourhood of Svyatoshynksyi is on the city's western edge, while Holosiivskyi is in its southwest.

The attack came exactly a week after Moscow launched more than 200 missiles and drones on Ukraine, killing seven people and striking energy facilities nationwide in what Kyiv called the war's "most massive" attack. (Reuters)