At least three drones targeting Moscow were downed, Moscow mayor Sergei Sobyanin said on the Telegram messaging app.

He said emergency services were dispatched to the sites where the drone debris fell, but he did not immediately report any damage.

Two of the four major airports servicing the capital limited operations, Russia’s civil aviation authority said on Telegram.

The Russian defence ministry said its air defence units destroyed 172 Ukrainian drones overnight, nearly half of them over regions bordering Ukraine.

Debris from a downed Ukrainian drone sparked a fire at an industrial site in Russia’s Tula region, Tula governor Dmitry Milyaev said on Telegram.

Milyaev did not give details about the industrial facility.

He said that Russian air defence units destroyed 12 Ukrainian drones over the region.

Ukraine has stepped up drone strikes deep inside Russia, saying it is targeting military, energy and logistics sites to disrupt Moscow’s war effort in response to Russia’s continued strikes on Ukraine.