Malaysia has said that it would be "premature" to speculate on whether debris washed up on the Indian Ocean island of Reunion comes from the missing Malaysia Airlines Flight MH370.
A two-metre long piece of wreckage was found on Wednesday.
Malaysia's Deputy Transport Minister, Abdul Aziz Kaprawi, said it was "almost certain" that the wreckage was from a Boeing 777 aircraft.
MH370 is the only Boeing 777 to have disappeared over an ocean.
There were 239 people on board the plane when it disappeared in March 2014.