A Malaysian airliner reportedly with 295 people on board hascrashed in Ukraine near the Russian border, on a flight from Amsterdam to Kuala Lumpur.
Malaysia Airlines said it had lost contact with Flight MH17 from Amsterdam. The last known position was over Ukraine, it said in a tweet.
An aviation source in Moscow told Reuters the plane had been found burning on the ground in east Ukraine.
Separatist rebels have been fighting government forces in the region.