Reunion Island's erupting volcano is running out of puff but the collection of found beach debris suspected of belonging to missing Malaysian Airlines plane MH370 is mounting.

Following the discovery of a Boeing 777 wing piece on the Indian Ocean island last Wednesday French authorities have responded to a number of questionable debris reportings.

On Sunday morning world headlines lit up that a "plane door" had been found on a rocky beach at Saint-Denis, Reunion's capital, only 25 kilometres from where the wing wreckage was found by a local beachcomber.