German public prosecutors said on Monday that the co-pilot of the crashed Germanwings plane had received treatment for suicide risk several years ago, but there was no proof he had had suicidal tendencies or aggression since then.
"There is so far no evidence of any organic diseases of the co-pilot, according to medical documentation obtained," prosecutors in the western German city of Duesseldorf said in a statement on Monday.
However, several years ago, before Andreas Lubitz got his pilot certificate, he had undergone psychotherapy treatment because of suicide risk, they added.
Information gathered from an audio recorder of the crashed flight 4U9525 led French prosecutors to believe that co-pilot Lubitz deliberately crashed the plane en route from Barcelona to Dusseldorf last Tuesday, claiming the lives of all 150 people on board.
Media reported that Lubitz may have been dealing with mental health issues.
The 27-year-old co-pilot had not been attested as having suicidal tendencies or aggression during his doctor visits in the subsequent period, the statement added.
Prosecutors did not give information on Lubitz's possible motives, saying there was a lack of clear information indicating any motives and that "they will not and cannot involve in speculations over motivations of the co-pilot".