Russia Plane

Russian officials say they can't rule out terrorism after a Russian military passenger jet plunged into the black sea.It's believed all 92 people on the Syria-bound flight have been killed.

Candles around the photo of the crashed TU-154 in the centre of Sochi, Russia Source: AAP

Russian authorities say they are not ruling out any possible causes for the crash, including a terror attack.

But Russian Transport Minister Maxim Sokolov insists it is too early to speculate.