Meanwhile, there was double tragedy as a police car travelling to the scene of the fallen plane collided with an other vehicle, killing the two people inside and seriously injuring three police officers, DPA reported.
Natalia Fileva, a co-owner of private Russian airline S7, died in the plane accident, the company said in a statement.
The air crash involved a six-seater aircraft travelling from France to the town of Egelsbach south of Frankfurt, Hesse, which went down in a field at around 2.30pm police said.
A second passenger, also believed to be Russian, and the pilot were also killed.
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 $600 million.
"On March 31st, 2019, S7 Airlines shareholder Natalia Fileva was killed at the age of 55 during the descent in a private Epic-LT plane to (a) Frankfurt airport. The cause of the tragedy is not yet known," the company said in a statement.
"After impact, the aircraft was completely burnt out," police said.
The police statement said the passengers would probably only be positively identified in the coming week.
Car crash nearby
Only a few kilometres away from the crash site, two people died in a collision between a police car and another vehicle. According to a police spokesman in Offenbach on Sunday, the three occupants of the patrol car were seriously injured. The two people in the other car died.
A car destroyed in the crash in Langen, Hesse. Two passengers died in the car and the three policemen were seriously injured. Photo: DPA
According to initial investigations, the police officers were on their way to the crash site of the plane. The car had apparently skidded and crashed head-on with the police vehicle during an overtaking manoeuvre, according to a police spokesman, reported Welt.