BNT released footage of the last minutes of the flight of the L-39 military training plane near the "Graf Ignatievo" base.
Two pilots died after the plane crashed while performing a complex maneuver at extremely low altitude.
The deceased were instructors from the air force school in Dolna Mitropolia and tomorrow they were supposed to take part in a special air show dedicated to the 20th anniversary of Bulgaria's accession to NATO.
For now, it is only clear that the two pilots performed the maneuvers repeatedly, the flight was planned long ago, and the crashed machine underwent a major overhaul in the Czech Republic earlier this year.