Dusseldorf University Hospital

As he was desperately trying to enter the cockpit of the crashed Germanwings plane, captain Patrick Sondenheimer shouted,'' Open the damn door!''

The last words of the captain were revealed through the black box recording found after the accident, as reported by German newspaper Bild Sunday.

The mental health of the co-pilot of crashed Germanwings passenger plane was a "serious lead" in the inquiry, but not the only one, French prosecutors said on Saturday.