Eleven people are killed, including the perpetrator, and eleven others are injured, in a mass shooting at a secondary school in Graz, Austria.

On 10 June 2025, at 09:57 CEST, a mass shooting occurred at the Dreierschützengasse secondary school in Graz, Austria.

A secondary school, high school, or senior school, is an institution that provides secondary education. Some secondary schools provide both lower secondary education and upper secondary education, i.e., both levels 2 and 3 of the ISCED scale, but these can also be provided in separate schools. There may be other variations in the provision: for example, children in Australia, Hong Kong, and Spain change from the primary to secondary systems a year later at the age of 12, with the ISCED's first year of lower secondary being the last year of primary provision.

Graz is the capital of the Austrian federal state of Styria and the second-largest city in Austria, after Vienna. On 1 January 2025, Graz had a population of 306,068. In 2023, the population of the Graz larger urban zone (LUZ) stood at 660,238. Graz is known as a city of higher education, with four colleges and four universities. Combined, the city is home to more than 60,000 students. Its historic centre (Altstadt) is one of the best-preserved city centres in Central Europe.

Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine states, of which the capital Vienna is the most populous city and state. Austria is bordered by Germany to the northwest, the Czech Republic to the north, Slovakia to the northeast, Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west. The country occupies an area of 83,879 km² (32,386 sq mi) and has a population of around 9 million.