A 21-year-old man shot dead nine people at a secondary school in Graz, Austria, before taking his own life. The incident, which left twelve others injured, is the deadliest mass shooting in Austria's history, prompting a three-day mourning period. The shooter was a former student of the school and police are investigating the motive behind the attack. Eyewitness accounts describe the chaos and confusion during the shooting, with students and teachers reacting swiftly to the danger. The victims were mostly Austrian citizens, and the shooter had legally owned the firearms used in the attack.