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Rescue helicopters are seen in front of the French Alps during a rescue operation next to the crash site of Germanwings Flight 9525 on March 24, 2015. Reuters

Germanwings pilot Andreas Lubitz sought medical attention repeatedly before Flight 9525 crashed into the French Alps in March, the Associated Press reported exclusively on Friday. Prosecutor Brice Robin told AP that Lubitz had previously contacted "dozens of doctors" about an ailment. Robin did not disclose what his symptoms were.

Authorities have said they believe Lubitz, a 27-year-old with 630 hours of flying experience, destroyed Flight 9525 on purpose March 24, killing all 150 people on board. Lubitz had been treated for severe depression years before the incident and had recently been declared "unfit to work," CNN reported.

The prosecutor is due to meet with victims' families on June 11 in Paris to share the results of his investigation into the crash.