A dropout student was reportedly seen turning on his own school and classmates who bullied him.

According to reports from local media outlets, the individual attacked a school in Austria on Tuesday, killing ten innocent people in what was called the most horrifying rampage.

Around a dozen others were wounded in the act as shots and screams filled the air when the 21-year-old student stormed into his former classroom, blasting a shotgun and pistol that he owned legally.

In what was called out as the country’s worst mass shooting incident, terror-stricken pupils acted like they were dead as they cowered into corridors and two classrooms or ran for their lives.

Video footage that was captured from the aftermath featured the sounds of shots that were followed by screams as the gunman picked off his victims at Borg Dreierschuetzengasse, which happens to be a high school in the country’s second biggest city, Graz.

Both students and teachers were among those killed.

Six female and three male victims were said to have passed away swiftly, while one adult was believed to be among them.

The tenth victim was a female who ended up dying from her injuries inside the hospital.