French officials are investigating whether plane wreckage that washed up on an Indian Ocean island is from missing flight MH370.

The debris, apparently a wing flap, was found on French-owned Reunion.

An aviation security expert said it had "incredible similarities" to a flap from a Boeing 777, the type of plane that vanished in March 2014.

But the island is a huge distance from the plane's search area and there have been other crashes much closer.