BERLIN, March 27-- There is no evidence to confirm that the 27-year-old co-pilot, who deliberately crashed Germanwings flight 4U9525 in the French Alps, was mentally ill, Duesseldorf police told Xinhua Friday.

After hours of house search on Thursday at the co-pilot's apartment in Duesseldorf, police said they have nothing new to talk about the investigation.

As for media reports about the co-pilot's mental problems, police said it was "a manifest error of interpretation of the English reporter."

"It has only been said that the evidence has been found and must be evaluated," a police officer said, adding that prosecutors will decide when the results can come out.

German news site Spiegel Online reported earlier that investigators found evidence that the co-pilot was mentally ill after the house search.

The Bild newspaper also reported possible mental illness of the co-pilot, based on a six-year-old memorandum of the German Federal Aviation Office.