An EgyptAir flight from Paris to Cairo crashed into the Mediterranean on Thursday with 66 people on board, prompting an investigation into whether it was a mechanical failure or a bomb.

There were no immediate reports of the discovery of any debris in the area of the sea between the Greek islands and the Egyptian coast where the plane vanished from radar screens.

But French President Francois Hollande confirmed that the plane had “crashed” .

The plane fell 22,000 feet and swerved sharply in Egyptian airspace before it disappeared from radar screen.