Forty-four passengers and six crew were on board a Boeing 737-500 which has crashed at Kazan in the republic of Tatarstan.
Tatarstan Airlines, the operator of the service, says that the accident involved its flight U9363 from Moscow to Kazan.
The airline has confirmed the passenger and crew figures and issued a manifest, but it is unclear whether there are any survivors.
Russia’s emergencies ministry says the aircraft “exploded upon landing” and that emergency services have attended the scene to carry out rescue operations.
The Tatarstan division of the ministry says the aircraft, which it originally identified simply as a Boeing jet, had been arriving from Moscow when it came down at 19:25.
Preliminary meteorological data from the airport at this time indicates rain and snow, with reduced visibility.