The Russian Ministry of Defense announced that 3 military personnel were killed as a result of what it said were Ukrainian drone attacks on two Russian air bases hundreds of kilometers away from Ukraine.
The ministry added - in a statement issued on Monday evening - that the attacks also caused minor damage to two aircraft and injured 4 people.
It indicated that it had intercepted Ukrainian drones in the Ryazan and Saratov provinces, where the two Russian bases are located.
And Russian media had reported earlier that 3 people were killed as a result of the explosion of a fuel truck at the air base in Ryazan, 185 km southeast of Moscow.
Meanwhile, the governor of Saratov province, Roman Busargin, tried to reassure residents following what he described as news on social media of a "buzz and flash" at the province's Engels Air Base.
The Engels base is located about 730 km southeast of Moscow, and it is one of two strategic bases for bombers in which the Russian airborne nuclear capabilities are located, and the other is located in the Amur Province in the Russian Far East.
Russia has between 60 and 70 strategic bombers of two types, the Tu-95 and Tu-160, both of which are capable of carrying nuclear bombs and nuclear-armed cruise missiles.
The cities of Ryazan and Saratov are hundreds of kilometers from Ukraine, where the Russian war entered its tenth month, and Russia carried out a new round of missile attacks today, Monday.