Last Updated Jun 5, 2015 5:26 PM EDT
MARSEILLE, France -- A state prosecutor says a co-pilot with a history of depression who crashed a Germanwings airliner into the French Alps had reached out to dozens of doctors ahead of the disaster, a revelation that suggests Andreas Lubitz was seeking advice about an undisclosed ailment.
Meanwhile, families of those killed in the crash received long-awaited news that they will start receiving bodies next week.
Marseille Prosecutor Brice Robin, who is leading a criminal investigation into the March 24 crash that killed all 150 people on board Germanwings Flight 9525, told The Associated Press that he has received information from foreign counterparts and is going over it before a meeting with victims' relatives in Paris next week.
In that closed-door meeting at the French Foreign Ministry on June 11, Robin will discuss his investigation and efforts to reduce administrative delays in handing over the victims' remains to grieving families, his office said Friday. Those remains are still in Marseille, frustrating some families.
Investigators say Lubitz intentionally crashed the jet after locking the pilot out of the cockpit. German prosecutors have said that in the week before the crash, he spent time online researching suicide methods and cockpit door security - the earliest evidence of a premeditated act.
Robin told the AP late Thursday that Lubitz had also reached out to dozens of doctors in the period before the crash. That suggests Lubitz was desperate to find an explanation for some mental or physical ailment, even as he researched ways of killing himself and others. Robin would not address the question of what symptoms Lubitz was assessing.
Germanwings and parent company Lufthansa had no comment Friday on the finding, citing the ongoing investigation. Prosecutors have previously said they found torn-up doctors' notes excusing Lubitz from work at his home, including one covering the day of the crash, and that he appears to have hidden his illness from his employer and colleagues.
Germanwings and Lufthansa have said that Lubitz had passed all medical tests and was cleared by doctors as fit to fly.
Robin noted delays in embalming the remains of the victims, which he said must be done according to the national rules of each of the 19 countries the victims came from. That complex process has prompted agonizing waits for many families.
Earlier this week, plans to repatriate the remains of the victims had been put on hold because of errors on death certificates. However, Elmar Giemulla, a lawyer representing several German families, said some of them were informed Friday that the repatriation will now go ahead as planned June 10.
Lufthansa said Friday that an MD11 plane will transport the remains of 30 victims from Marseille to Duesseldorf on Tuesday, and they will be handed over to relatives on Wednesday.
Further remains will be transported to the victims' homelands over the coming weeks, it said.
Robin said he had received responses to a formal French request for international cooperation in his probe, including from Germany - home to about half of the victims, and to Germanwings and its parent company Lufthansa. Robin said he would address the media after thoroughly examining the responses and meeting the families next week.
For now, "I have decided to prioritize the victims' families," he said.