MARSEILLE (AFP) - French authorities said Thursday that the condition of the second black box of the doomed Germanwings plane, discovered after a nine-day search, "gave hope" that the data on the device could be used.

Prosecutor Brice Robin also said that 150 separate DNA profiles had been isolated from the site in the French Alps where the Germanwings jet crashed on March 24, killing all 150 on board instantly.

Authorities are hoping to unearth more clues about the disaster from the black box after the first voice recorder suggested that co-pilot Andreas Lubitz deliberately locked the plane on a collision course with the mountains.