Munich attack

The teen who had German and Iranian nationality, was obsessed with mass killings and spent a year preparing for the shooting spree, police said.

At least 35 people were also wounded during Sonboly's attack, which began at a McDonald's outlet and ended with him turning his 9mm Glock pistol on himself.

Key points

• Seven of the nine victims were teenagers, though unclear if youth were targeted
• Police find book on school shootings in gunman's home
• Questions over how shooter obtained gun given strict German laws

"[He] said he would treat them to what they wanted as long as it wasn't too expensive — that was the invitation," Robert Heimberger, president of the Bavarian state criminal agency, told a news conference.

Europe reacted in shock to the third attack on the continent in just over a week, after a black-clad gunman went on a shooting spree at a shopping mall on Friday evening (local time).

Munich prosecutor Thomas Steinkraus-Koch said the 18-year-old German-Iranian — named as David Ali Sonboly — had suffered depression and reportedly undergone psychiatric treatment.

"There is absolutely no link to the Islamic State," Munich police chief Hubertus Andrae said.