But while Marseille prosecutor Brice Robin said that 78 distinct DNA strands had been isolated among the remains, he refused to confirm that any of the remains had been formally identified.
German media carried reports on Sunday that Lubitz may have been suffering from a detached retina, and officials have said it appears he was hiding details of an unspecified medical condition from his employers.
And while the pilot was also reported as having a history of depression, Robin said police were yet to speak to his family "out of decency and respect for their pain".
Mr Robin told the AFP News Agency that investigators still haven't found the second "black box" flight recorder at the crash site, which monitors technical data and could allow them to definitively rule out any mechanical failure with the plane.
He said that authorities were building a road to allow access for all-terrain vehicles to the site in the mountains above the village of Prads-Haute-Bléone. It will make it easier to remove largest parts of the plane - though they are no bigger than a car - and could be completed by Monday night, Robin said.
- Independent