A defense official said the man, 21, was turned down for military service after failing a psychological test. Investigators are asking how he passed another such test to obtain a gun permit.

Mayor of Graz says presumed gunman among the dead as local media report 28 people are being treated for injuries.

Students were sitting in their classrooms at a secondary school in Graz when a 21-year-old Austrian man shot dead nine people, before killing himself. Twelve people were injured in Tuesday morning's violence,