A shooter opened fire at a high school in the Austrian city of Graz on Tuesday, killing 10 people, including teenagers, in one of the worst rampages in the country’s history.

Officials in Austria say a school shooting has left at least 10 people dead in the European nation's second-largest city, Graz. The shooter is also dead.

Austrian Chancellor Christian Stocker described the horror as a 'a dark day in the history of our country' and a national tragedy in a press conference on Tuesday afternoon