There were no survivors, an emergency services source told the Tass news agency.
There were 65 passengers and six crew members onboard the plane which went missing from radars less than 10 minutes after taking off from Moscow's Domodedovo airport, TASS reported.
There were no other details immediately available.
Russian state television aired a video of the crash site, showing parts of the wreckage in the snow. All the passengers have been killed as per the media reports emerging from Russian Federation.
The Emergencies Ministry said it had sent crews to the crash site, in Stepanovskoye.
Pakistan Human Rights lawyer, activist Asma Jahangir dies of cardiac arrest
She later went on to become the first woman to serve as the president of the Supreme Court Bar Association, The Dawn reported. She has received several awards, including a Hilal-i-Imtiaz and a Sitara-i-Imtiaz in 2010.
The Russian-made plane was 7 years-old and bought by Saratov Airlines from another Russian airline a year ago.
The An-148 regional jet disappeared from radar screens shortly after takeoff from Moscow's Domodedovo Airport on Sunday afternoon.
A spokeswoman for Russia's Investigative Committee, which handles serious crimes, told Russian news agencies that it is opening a criminal case to look into possible violations of transport safety regulations or careless behavior resulting in deaths.
Plane crashes are common in Russian Federation, where airlines often operate ageing aircraft in testing flying conditions.
Pilot error was blamed for that crash.