"To ensure the safety of civil aircraft flights, temporary restrictions have been introduced on the operation of Sheremetyevo, Domodedovo, Vnukovo, Zhukovsky and Kaluga airports," Rosaviatsiya said on Dec.

All four of Moscow’s airports have been temporarily closed without any reason given, according to Russia’s aviation watchdog. ‘Aircraft crews, air traffic controllers and airport services are taking all necessary measures to ensure flight safety,

Earlier, a Russian cargo ship that Kyiv says was intended to collect weapons from military bases in Syria sunk on route in the Mediterranean Sea. Officials in Moscow said two crew members are missing after an engine room explosion sank the Ursa Major between Spain and Algeria.