Russia said it had shot down 50 Ukrainian drones overnight and early Wednesday -- particularly over regions bordering Ukraine.
Russian systems "destroyed or intercepted 44 Ukrainian aerial drones," according to a statement from the Russian Defense Ministry.
The majority were neutralised over the Novgorod region, according to the ministry.
Other drones were shot down in Kursk, Belgorod and Briansk, as well as over the Moscow region.
In addition, six Ukrainian drones were shot down Wednesday morning over the Samara, according to the regional governor, Vyacheslav Fedorishchev.
The attack did not cause any injuries or damage, he said on Telegram.
Russia announces almost daily that it has destroyed Ukrainian drones launched against its territory.
Kyiv says it carries out these strikes, which often target energy sites, in response to Russian bombings of its territory.