Austria is in mourning after one of the deadliest school shootings in the country’s history unfolded on Tuesday morning in Graz.

A 21-year-old former student of the BORG Dreierschützengasse opened fire shortly before 10 a.m., killing at least nine people and injuring dozens of others before taking his own life in a school restroom.

According to initial reports from Kronen Zeitung, the attacker used both a shotgun and a handgun during the rampage, which targeted two classrooms. Authorities confirmed that the gunman, a former pupil of the school, had recently acquired the weapons and may have been motivated by a long-standing grievance over bullying.

Governor Mario Kunasek of Styria (FPÖ) expressed deep shock in a public statement, “It is unbelievable what happened today in Graz. As governor and as a father, I am deeply saddened by this act of madness, which has brought so much disaster and incredible suffering. My thoughts are with the innocent victims, families, and teachers.”