Medical workers initially told the TASS news agency at least 13 people had been killed, but investigators now say 41 people are dead.
A plane has burst into flames upon landing at an airport in Moscow.
One person was killed and at least five were injured when a Russian plane exploded into flames as it made an emergency landing at Moscow's main global airport.
Russian investigators said they had opened an investigation and were looking into whether the pilots had breached air safety rules. There reportedly were 78 people aboard.
The plane had taken off from the airport bound for Murmansk, but turned back after encountering unspecified problems in the air.
The Russian-made Sukhoi Superjet-100 carrying 73 passengers and five crew members had just left Sheremetyevo, on a domestic route, when the crew issued a distress signal, officials said.
The plane was a one-year-old Sukhoi Superjet and requested an emergency landing shortly after take-off, due to the fire, according to Russian state media.
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Sheremetyevo Airport was closed for a short period of time as a result of the accident. Others said the plane made a hard landing that could have caused the engines to catch fire.
Dramatic footage shared on social media showed the Aeroflot-owned aircraft engulfed in flames as it landed on the tarmac at Sheremetyevo, Moscow´s busiest airport.
This is likely what may have caused the deaths of passengers at the back of the plane.
Earlier, the regional emergency services reported six victims.
Russia's Investigative Committee has launched a criminal probe into the incident, it said on its website.
As it stands, one runway is now still in use at the airport, but some flights are diverting to other airports as a result of the crash landing.
A passenger called mikkentosh posted: "Guys I am all right, I am alive and in one piece".