Russian rescue services have discovered the wreckage of the Angara airlines An-24 plane, carrying 43 passengers and six crew from its destination in the far-eastern Amur region.
The plane had left Blagoveshchensk close to the Chinese border and vanished from radar as it approached Tynda airport, emergency officials said.
Amur’s regional governor Vasily Orlov said “all necessary resources” had been deployed to find the plane. Five children were among those on board, he added.
Shortly afterwards, Russia’s emergencies ministry said a Russian civil aviation helicopter had spotted a burning fuselage from the plane.
Amur’s civil defence centre said the plane had been found on a hillside about 16km (10 miles) from Tynda, Tass news agency reported.
Emergency services said rescuers were heading for the scene.
The An-24 plane had been on the final leg of a route from Khabarovsk in the far south-east of Russia.