MOSCOW, December 30 (RIA Novosti) – The Moscow government will pay cash compensations to the families of Russians killed in an air crash at Moscow’s Vnukovo airport, the Moscow Mayor’s press secretary, Gulnara Penkova, said on Sunday.

Four people were killed when a Russian Tupolev Tu-204 medium-haul airliner overshot the runway while landing at Russia’s third busiest airport and caught fire on Saturday evening. Four other people were hospitalized in a grave condition.

“Moscow Mayor Sergei Sobyanin has instructed corresponding departments to render necessary financial aid to the victims’ families, which will be paid 1 million rubles [$32,000] each,” she said.

The cause of the incident was not immediately clear. Sources in the Emergencies Ministry said pilot error is currently being viewed as the probable cause.

There were eight people on board the plane, all of whom were crewmembers, flying from the Czech Republic.

Prime Minister Dmitry Medvedev has ordered a special commission to be set up to investigate the accident, government press spokeswoman Natalya Timakova said.

The plane belonged to Red Wings, a Moscow-based airline that operates 8-10 Tu-204 planes, each with capacity to carry up to 210 passengers.

The Moscow city transport prosecutor's office has launched a criminal probe into the airline's compliance with Russian aviation safety regulations.