Azerbaijan Airlines flight J2-8243 had flown hundreds of miles off its scheduled route to crash on the opposite shore of the Caspian Sea near the city of Aktau after what Russia's aviation watchdog said was an emergency that may have been caused by a bird strike. But an aviation expert suggested that cause seemed unlikely.
Officials did not immediately explain why it had crossed the sea, but the crash came shortly after drone strikes hit southern Russia. Drone activity has shut airports in the area in the past and the nearest Russian airport on the plane's flight path was closed on Wednesday morning.