A preliminary report by the Agency for Air, Maritime and Railway Accident Investigation (AIN) has determined the probable cause of the crash of an American single-engine piston aircraft, a Beechcraft G36 Bonanza, in Medulin on June 4. The accident occurred in the morning hours while the aircraft, registration D-ENTT, was flying from Lienz, Austria, to Istria with plans to land at Medulin Airport. Four Austrian citizens were killed in the crash.