Austrian police search for answers after mass shooting in school

Several people died in a school shooting, including the attacker. Picture: Ervwin Scheriau, APA/AFP via Getty Images.

Austrian authorities were seeking clues on Wednesday to why a 21-year-old gunman shot dead 10 people in a rampage at his former high school before killing himself, one of the worst outbreaks of violence in the country's modern history.

Police said the man acted alone, armed with a shotgun and a pistol. They are scouring his home and the internet to understand why he opened fire on the school in Austria's second city of Graz on Tuesday, before shooting himself in a bathroom.