State news agencies TASS and RIA, citing the ministry, said the aircraft lost communication before going down on the Black Sea peninsula, which Russia annexed from Ukraine in 2014.

The ministry said the dead included 23 passengers and six crew members, with no survivors reported.“The An-26 aircraft, with which communication was lost earlier, crashed into a cliff,” TASS quoted officials at the crash site as saying.

Authorities located the wreckage in Crimea, though further operational details were not immediately disclosed.Russia’s defense ministry did not provide additional comment outside regular business hours.

RIA news agency reported that, according to an initial assessment, technical problems were believed to have caused the crash.

No confirmation was given on whether an official investigation had been launched or if other factors were being examined.

The An-26 is a Soviet-era twin-engine turboprop widely used for military transport and logistics operations.

The defence ministry said earlier that the aircraft went down after experiencing a technical failure while carrying out “routine duty,” without providing further details on the nature of the malfunction or the mission profile.

Authorities said rescue teams were continuing efforts to locate the final missing individual, following the recovery of six bodies from the crash site. No timeline was given for the completion of the search operation.

Officials did not disclose the identities or nationalities of those on board, nor did they specify whether the helicopter was military or civilian-operated.investigation into cause underwayThe incident is under investigation, with authorities expected to examine technical and operational factors behind the crash.

No additional information was released regarding weather conditions or flight data at the time of the crash.

Helicopter accidents in maritime zones typically involve coordinated responses from defence and interior agencies, particularly in cases involving offshore operations or patrol duties.