A jet which had set off from Moscow's Domodedovo airport to Orsk in the Ural mountains, near Russia's border with Kazakhstan has crashed down 71 passengers who were on board dead.
The An-148lost of Saratov Airlines got lost some few minutes after taken off and crashed near Argunovo, a town about 80km (50 miles) south-east of Moscow.
Flightradar24, which is a light-tracker has tweeted that the aircraft was descending at 1,000m (3,300ft) per minute (60km/h, 38mph) five minutes after taking off.
Saratov Airlines is based in Saratov, 840km south-east of Moscow.
In 2015 it was banned from operating international flights when surprise inspectors found someone other than the flight crew was in the cockpit.
The airline appealed against the ban and changed its policy before resuming international charter flights in 2016.
It flies mainly between Russian cities but also has destinations in Armenia and Georgia.
Russian airlines have suffered two major plane crashes in recent years:
A Tu-154 military airliner crashed into the Black Sea with the loss of all 92 people aboard on 25 December 2016, with the disaster blamed on pilot error
A Russian Airbus A321 carrying tourists crashed in Sinai, Egypt, with the loss of all 224 people aboard on 31 October 2015; the Islamic State group said it had placed a bomb aboard