The three biggest Moscow airports suspended arrivals and departures early on Tuesday, Russia's TASS news agency reported.
The national airline, Oman Air, operates scheduled weekly four flights to Moscow's Sheremetyevo from Muscat.
"The air space is closed over Vnukovo, Sheremetyevo, and Domodedovo," an unnamed official told the agency.
"Flights are not being received, and departures are delayed," the person said. Russia reported a series of Ukrainian drone attacks on Monday and Tuesday, including over Moscow.
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