 The commander of "Shch-301" G. Goldberg's report on the incident held in the Russian State Naval Archives starts with the notice of a Finnish airplane on its way from Tallinn to Helsinki on 14 June 1940 at 15.05 PM.According to the report, the airplane was chased by two Soviet Tupolev SB high-speed bombers.At 15.06 PM, the Finnish airplane caught fire and fell into the sea, from the submarine.