A pilot instructor and his student were killed in a crash of a trainer aircraft in southern Russia Saturday.
The single-engine plane operated by the local air club 'Dostupnoye Nebo' (accessible sky) crashed outside Rostov-on-Don in the afternoon.
Technical malfunction was cited as a preliminary cause, said rescue services and transport investigators.
The federal aviation watchdog said the plane had lost speed and fell into uncontrollable spin, according to preliminary investigation.
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