Seat cushions and plane windows have now been found on Reunion Island, the Malaysian government said on Thursday.
It earlier confirmed that a wing part washed up on the French overseas territory was from missing Flight MH370.
It is the first firm evidence that the aircraft crashed into the ocean.
But what went wrong remains unknown.
While Malaysia’s Prime Minister Najib Razak said the flaperon was from MH370, prosecutors in France, where the part is being analysed, stopped short of declaring they were certain.
The flight mysteriously vanished from radar on March 8, 2014, as it travelled from Kuala Lumpur to Beijing with 239 people on board.
Search efforts have focussed on a broad expanse of the southern Indian Ocean off Australia.
Australian Foreign Minister Julie Bishop said: “We want to continue to use this piece of evidence to better inform out search efforts, but what it does tell us is that it is consistent with the search area that we are currently focussed upon and so that is good news that we have at least narrowed it down to that part of the ocean where we hope the plane will be found.”
Simulations of the debris path suggest wreckage could continue washing up on Reunion.
But until the ‘black box’ recorders are found, the mystery of what happened to Malaysia Airlines Flight MH370 will remain intact.