Russia reported a new drone attack on Moscow in the early hours of Saturday, which again forced the authorities to temporarily shut down all three major airports serving the capital.
Moscow Mayor Sergei Sobyanin said that a drone was brought down by air defense systems over the Istra district of the Moscow region. The district is some 50 km (31 miles) west of the Kremlin.
Three major Moscow airports, Sheremetyevo, Domodedovo, and Vnukovo, suspended flights for a couple of hours on Friday, the TASS news agency reported.
Ukraine ramping up its use of drones
Aerial attacks on Moscow and other Russian-held territory have intensified in recent weeks, including 42 drones intercepted over the Russia-held Crimean Peninsula on Friday - one of the biggest reported air assaults since the war began.
Although the attacks have not caused extensive damage, their intensity has forced the Russian authorities to temporarily shut down airports serving the capital several times this week.
Russia has blamed Ukraine for the Friday attack and all the previous assaults that intensified after two drones were destroyed over the Kremlin in early May.
Ukraine did not immediately comment and almost never publicly claims responsibility for attacks inside Russia or on Russian-controlled territory in Ukraine.
The Ukrainian military has said previously, however, that destroying Russia's military infrastructure helps a counteroffensive that Ukraine began in June.
Later on Saturday, Russia announced it had downed another drone.
Moscow Mayor Sergei Sobyanin said that this one was brought down by air defense systems over the Istra district of the Moscow region. The district is some 50 km (31 miles) west of the Kremlin.