Russia says it shot down two Ukrainian drones flying over the Moscow region, while Kiev continues to ramp up its airstrike on its eastern neighbor.
Defense Ministry officials also said they intercepted two more UAVs over the Bryansk region, northeast of the Ukrainian border.
Officials have been forced to close airspace over the capital, resulting in delayed and canceled flights.
Moscow Mayor Sergei Sobyanin said Tuesday morning that air defenses shot down two drones west of the capital in the Krasnogorsk and Schastsy districts.
There have been no reports of injuries resulting from the attacks, which appear to be more common.
At least two people were injured on Monday when parts of a destroyed drone fell on a house in the Moscow region.
Moscow's prestigious financial center has also come under attack in recent weeks, with several buildings suffering significant damage from UAV attacks.
The governor of the Moscow region said on his Telegram channel: “Tonight two drones were intercepted by the air defense in the Moscow region: in Shastsy in the Odintsovo district and in Krasnogorsk, in the Pavshinsky floodplain.”
“The focus of all operational services is on the second incident.
“A blast during the fall shattered windows in a high-rise building and damaged cars.
“There were no injuries among the residents and there was no fire.”
President Zelenskyy has warned the Kremlin to expect more air strikes on its cities, saying it is a “natural” and “fair” process.
In a recent speech to journalists, he said: “Ukraine is getting stronger.”
“Gradually, the war is returning to the territory of Russia – to its symbolic centers and military bases, and this is an inevitable, natural and absolutely fair process.”
The Russian Defense Ministry also said it had destroyed a Ukrainian reconnaissance boat in the Black Sea.
An official said the reconnaissance boat was spotted near Russian gas extraction facilities.
The crew of a SU-30 fighter jet opened fire on the ship, destroying it.
Media reports in Ukraine claim a Russian supersonic bomber was destroyed by a drone on Saturday.
Images shared on social media show a Tupolev TU-22 long-range bomber on fire at an airbase south of Saint Petersburg.
The Russian bomber can fly at twice the speed of sound and has been widely used by the Kremlin to attack cities in Ukraine.
Costing around US$40m (£31m) to manufacture, it can be armed with Kh-32 missiles and either Kh-15 or Kh-15P anti-radar missiles.
The aircraft is also equipped with a GSH-23 (23 mm) twin-barreled gun in the tail turret, which is remotely controlled.
A Defense Ministry official said the bomber was “damaged” after a “helicopter-type drone” attacked an air base in the Novgorod region.
“The UAV was spotted by the airfield's observation post and fired on by small arms,” the Russian ministry said.
“One plane was damaged; there were no injuries from the terrorist attack.”