After 2 minutes of a Russian Military plane departing from Sochi at 05:25 (02:25 GMT) and being off the radar, it was found crashed into the Black Sea.This plane carried a famed military band, which was meant to entertain the Russian forces in Latakia, Syria. Reports say that the passengers also included Journalist, members of the famous Alexandrov Ensemble, and 10 crew members of the plane. Many reports say that 11 bodies were found, but authorities say that all 92 people who were on board are believed to be dead. More 30 vessels were deployed at the Black Sea, with more than 100 divers searching at the crash site.
Currently, investigator are looking into this, searching for possible reasons why the crash occurred. They are also including the possibility that this could be a Terrorist Attack.

Sources:
http://www.bbc.com/news/world-europe-38430164

http://www.nytimes.com/2016/12/25/world/europe/russian-military-plane-crash-alexandrov-ensemble.html

http://www.aljazeera.com/news/2016/12/russian-military-plane-disappears-radar-161225045201828.html

Side-note: This is my 1st time making something like this, so please understand, it's probably not that great, yup ._.