File photo taken on Dec. 4, 2010 shows an image of Tu-154 plane after its emergency landing at Domodedovo airport in Moscow, Russia.

The wreckage of a missing Russian military Tu-154 aircraft has been found in the Black Sea, Defense Ministry authorities said Sunday.

The ill-fated plane, carrying 91 people en route to the Syrian port city of Latakia, vanished from the radar screens shortly after taking off from the resort city of Sochi, according to preliminary reports.

"Fragments of the Russian Defense Ministry's TU-154 aircraft were discovered in 1.5 kilometers from the Black Sea shore of Sochi at a depth of 50-70 meters," the ministry's press service said.

The plane was conducting a routine flight to Russia's Hmeimim air base near Latakia, said the ministry, adding that among those on board were Russian servicemen and members of the Alexandrov Ensemble, the Russian army's official choir, who were headed to the base for New Year celebrations.

There were also nine media representatives on board, the ministry noted.

Based on preliminary information, the misfortune was caused by technical malfunction or pilot error, a law enforcement source was quoted as saying.

Russia's Investigative Committee said it has launched a criminal case over the crash.

The Tu-154 is a three-engine medium-range airliner produced by Russian aerospace and defense company Tupolev. It is one of the fastest civilian aircraft in use and widely used in extreme Arctic conditions.

UPDATE: Vanished Russian TU-154 aircraft possibly has crashed in mountains in Krasnodar Krai -- report

UPDATE: Russian Ministry of Defense confirms 91 people on board the missing aircraft.

UPDATE: Missing Russian plane has 82 passengers & 10 crew members on board, allegedly been heading to Latakia, Syria: RT

MOSCOW, Dec. 25 -- A Russian Defense Ministry flight carrying 70 people has vanished from the radar screens after departing from the resort city of Sochi, Russian media reported Sunday, citing preliminary findings.

The Tu-154 aircraft is not a civilian one and was en route to the Syrian port city of Latakia, the Sputnik news agency quoted Russian aviation and emergency ministry authorities as saying.

The Tu-154 is a three-engine medium-range airliner produced by Russian aerospace and defense company Tupolev. It is one of the fastest civilian aircraft in use and widely used in extreme Arctic conditions.