Reports just coming in says a Russian plane has disappeared from radar just minutes after take-off from the Black Sea resort of Sochi, Russian media say.
According to the BBC, a source at the emergency ministry says the missing aircraft is a Tu-154.
Between 70 and 100 people are reported to be on board the plane.
Unconfirmed reports say the aircraft belongs to the defence ministry, flying to Syria’s Latakia province. Russian officials have so far made no comment.
Interfax news agency reports quoted a source as saying that the plane disappeared from radar 20 minutes after take-off at 05:20 local time (02:20 GMT).
Details coming later…