Among the 92 people onboard were musicians thought to be from the Alexandrov Ensemble, one of the world’s most famous military choirs
According to reports from UK Mirror, there were no immediate reports of survivors and there are fears that all of the passengers and crew on the aircraft were killed in the horror crash.
Some of the wreckage was said to be at a depth of 50 to 70 metres.
In addition to members of the Alexandrov Ensemble, the plane was reportedly carrying Russian servicemen and journalists when it plunged into the sea
Initial reports suggested a technical fault occurred as it gained altitude after takeoff.
“91 people, including musicians and media were on board the aircraft,” said a security services representative. This figure was later said to be 92.
The plane was travelling to Latakia in Syria when it vanished from radar screens and crashed into the sea, Russian agencies reported, citing unnamed security sources.
Contact with the aircraft was lost at around 5.40am local time (2.40am UK time).
“The jet disappeared from radars about 20 minutes after takeoff: it departed [from Sochi] at 5.20 AM local time and the contact was lost at about 5.40 AM,” said one source.
The Alexandrov Emsenble is an official army choir of the Russian armed forces.
Founded during the Soviet era, the ensemble consists of a male choir, an orchestra, and a dance ensemble.
Leading TV presenter Andrey Malakhov said today on Twitter: “On board of crashed aircraft were my colleagues – journalists … very sad morning … RIP”.