Russia launched a swarm of attack drones at critical infrastructure in Kyiv on Monday in strikes that Ukraine said provoked emergency blackouts in a dozen regions.

The attacks came as Russia said it had shot down several US-made missiles over its airspace near Ukraine and President Vladimir Putin was due to visit neighbouring Belarus, used as a staging ground the invasion of Ukraine.

"I first heard the air raid siren howling from the street... I thought there is going to be a drone attack. For the first time, it scared me," Natalia Dobrovolska, a 68-year-old resident of Kyiv told AFP.

She described hearing multiple explosions before power shut off in her building in western Kyiv. Officials said Russia had dispatched 35 attack drones nationwide, including 23 over Kyiv.

Ukraine said it had downed 30 of the aerial weapons, including Iranian-made "Shaheds", which have pummelled the capital in recent weeks.

Mayor Vitali Klitschko said critical infrastructure facilities were "damaged" but there were no known casualties.

Energy operator Ukrenergo said emergency electricity outages were scheduled in the capital and nearly a dozen regions.

Moscow said its air defence systems had shot down four US-made missiles over Belgorod, a Russian region bordering Ukraine, in one of its first such claims in nearly 10 months of fighting.