GERMANY - Germanwings co-pilot Andreas Lubitz, who was believed to have intentionally crashed Flight 9525 into the French Alps which killed all onboard, allegedly underwent psychiatric treatments due to "suicidal tendencies."

Initial investigation on Lubitz allegedly cited that the doctor provided Lubitz a note that excused him from work during the day of the crash. But Lubitz ignored the advice of his doctor and reported to work.   

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"A few years ago, the co-pilot had been in psychotherapeutic treatment which noted suicide risk over a long period before he gained his pilot license," Dusseldorf Public Prosecutor Ralf Herrenbrück said. "In the following period and until recently, further doctor's visits took place resulting in sick notes without any suicidal tendencies or aggression against others being recorded."

Another prosecutor, Christoph Kumpa, said that the doctor's note during the day of the crash showed that Lubitz was medically unfit to work.

The prosecutors believe that Lubitz probably hid his mental status from his co-workers and employer as this might adversely affect his career as a pilot. However the prosecutors stated that the motive for crashing the plane still remains undetermined.

In a statement, Kumpa added that they still have no evidence to assume that Lubitz previously planned to do what he did. They still have not found any letter or confession that would point to his real motivation for crashing the aircraft.

In 2008, Lubitz enrolled in Lufthansa's training school in Arizona. In 2009, he allegedly underwent psychiatric treatment for more than a year after he was diagnosed with "serious depressive episode."

Andreas Lubitz became a licensed pilot in 2013.

TagsGermanwings, andreas lubitz, plane crash