"Yes, we will work with the Russians, expect help from our Russian partners," a representative of the bureau said, adding that the German side was still playing the decisive role in the probe.
READ MORE: Russian S7 Airliner Co-Owner Among Killed in Germany Plane Crash
A light six-seat plane, carrying Fileva and her father, crashed in central Germany on Sunday.
The plane belonged to the Globus air company, which is a part of S7 Airliner, a source in the Russian Federal Air Transport Agency (Rosaviatsia) told Sputnik.
S7 Airlines confirmed that the company's co-owner Natalia Fileva died as a result of the crash.