A Russian military transport aircraft crashed in Crimea, killing 29 people, according to the country’s defense ministry. The incident occurred on the evening of March 31 near a mountain peak close to the Black Sea. The ministry confirmed that the victims included six crew members and 23 civilian passengers. The aircraft, identified as an AN-26, disappeared from radar around 8 p.m. Moscow time while on a scheduled flight within Crimea.

Russian authorities have not clarified the total number of people on board, but no survivors have been reported. State news agencies TASS and RIA cited defense officials as saying that preliminary investigations suggest a technical malfunction caused the crash.

The AN-26 model has been in service since the 1960s and is primarily used for cargo transport. Several previous accidents involving this aircraft type have been recorded, according to the report.