Investigators found the message yesterday when they searched the home of the 21-year-old shooter who took his life after his attack at BORG Dreierschützengasse high school in the city of Graz.

The 21-year-old suspect opened fire on students and staff at the BORG Dreierschuetzengasse high school in Graz, killing nine and injuring 28.

More than a dozen others were wounded as shots and screams rang out when the 21-year-old stormed into his old classroom blasting a shotgun and a pistol which he legally owned.