Drones attacked the Savasleyka airfield in Russia's Nizhny Novgorod region this morning.
MiG-31K aircraft, which are carriers of Kinzhal missiles, take off from there.
It is not yet known if the airfield was hit. The road leading to it has been blocked, according to Russian social media channels.
Drones also carried out a massive attack on Russia's Voronezh region.
Local authorities reported a strike involving 35 drones.
There are reports of damage to residential and non-residential properties, utility infrastructure, and vehicles.
Ukrainian channels mentioned an attack on the "Baltimore" military airfield, but this has not yet been confirmed.