Passengers arriving in Moscow from Turkey on Thursday could find their flights cancelled due to the arrival of a military coup, Russian news outlets reported.
The coup on Saturday brought the Russian capital under a state of emergency, and President Vladimir Putin has declared martial law, which has since been lifted.
A Russian military spokesman told Interfax news agency that military forces had been instructed to use force to restore order.
The spokesman said a number of flights were being cancelled and that passengers had been warned to avoid Moscow and other cities.
There were no immediate reports of any casualties.
Russia’s aviation industry has suffered a string of high-profile security incidents in recent years, including a failed coup attempt in 2014 and an attempted bombing in Moscow in 2016.
But the country’s aviation sector is also struggling with the economic crisis in the world’s largest economy.
Last month, Russia’s state-owned airline, Aeroflot, said it would lay off almost 2,000 staff, a move that would affect about 20 per cent of its staff.