Tributes poured in Monday for Natalia Fileva, co-owner of Russia's second largest airline S7 who died in a jet crash in Germany, where aviation specialists from Moscow were headed to assist the probe.
Fileva, the 55-year-old co-owner of S7, died Sunday along with her father and the pilot when her six-seater aircraft crashed near Frankfurt, said the airline, the main rival to Russia's flagship carrier Aeroflot.
Russia's Interstate Aviation Committee said it would help the German Federal Bureau of Aircraft Accident Investigation to probe the tragedy.
"The group is getting ready to fly out to Germany very shortly," a spokeswoman said.
The six-seater aircraft went down in a field while flying from France to Egelsbach south of Frankfurt, German police said.
Fileva, whose husband is S7 CEO Vladislav Filev, was listed in 2018 by Forbes magazine as the fourth richest woman in Russia with an estimated fortune of USD 600 million.
Police said the aircraft was completely burnt out and the victims would probably only be formally identified in the coming week.
S7 Group, which owns S7 Airlines, said the circumstances of the tragedy "were not yet known."
The company praised its chief as a "bright, caring leader and great person."
Russian space agency chief Dmitry Rogozin called Fileva a "great aviation and space enthusiast."