More than 300 police were called in after shots were heard around 10 a.m. at the school, for pupils of 15 and above. Ambulances also arrived within minutes as the premises were cordoned off.

The incident occurred at around 10 a.m. local time on the morning of Tuesday, June 10 Multiple students and at least one adult were killed in the attack, according to the Austria Presse Agentur (APA).