A devastating incident leaves Austria in Shock: School Shooting in Graz Leaves 10 Dead, Suspect Identified as Former Student. Austria was plunged into grief and shock on Tuesday after a mass shooting at a high school in Graz claimed the lives of 10 people, including the gunman, in what is being called one of the country's deadliest attacks in modern history. The incident, which occurred at BORG Dreierschützengasse school, has triggered a wave of national mourning and left investigators searching for answers.