Moscow’s Sheremetyevo Airport received a bomb warning suggesting bombs had been installed in three planes.
RIA Novosti news agency reported that more than 30 flights were delayed or cancelled at Moscow’s airports on Wednesday as a result.
An airport in Khabarovsk in east Russia received a bomb threat via email on Wednesday, according to the news outlet.
Russia’s second largest city, St Petersburg, was also targeted in the attacks.
The city’s Pulkovo Airport and all district courts and tax inspectorates on Wednesday received messages of bombs that were installed, the Moika 78 news agency reported.