German police have found no evidence to connect the Munich gunman with Islamic State, police chief Hubertus Andrae says after a search of the suspect's apartment in an early morning raid.
The Munich shooting spree is being treated as a classic case of someone running amok with "no political motivation", the state prosecutor said, adding that the 18-year-old German-Iranian student may have received medical treatment for psychiatric problems.
Investigators found material on mass shootings in the gunman's room, Andrae added.
Police said they have so far been unable to interview the gunman's parents because of their current distressed state.
Named in reports as Ali Sonboly, police said there were indications the gunman had been in psychiatric care and treated for depression.
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Police said 10 of those injured in the mass shooting which killed nine people are currently in a critical condition, including a 13-year-old boy.
With parts of the crime scene now cleared and released, they said it was too soon to say when the Olympic shopping centre would re-open.
