Munich police chief Hubertus Andrä said that the shooting appeared to be a " classic shooting rampage " and not terrorism . Police said that the gunman was obsessed with mass shootings and that written material on such attacks was found in his room . Prosecutor Steinkraus Koch said that the gunman had a book about school shootings called '' Why Kids Kill : Inside the Minds of School Shooters '' by Peter Langman . No references to religion were found in documents in his home . Andrä said that there was an " obvious " link between the shooting and the fifth anniversary of the 2011 Norway attacks committed by Anders Behring Breivik . However , a police search of the shooter 's residence did not find the manifesto written and distributed by Breivik . According to '' Abendzeitung '' , the shooter 's own manifesto was found on his computer 's hard disk
2011 Norway attacks
2011 Norway attacks
2016 Munich shooting