A shooting in the Alsterdorf quarter of Hamburg, Germany, kills eight people and injures another eight.

On 9 March 2023, a mass shooting occurred at a Jehovah's Witnesses Kingdom Hall in the Alsterdorf quarter of Hamburg, Germany. The shooter, identified as 35-year-old Philipp Fusz, entered the building after a service was held there and opened fire, killing six adults and an unborn child, and injuring eight others before killing himself minutes later. Fusz was a former member of the Jehovah's Witnesses, had no previous criminal record, and was not a known extremist. Police received an anonymous letter indicating he was angry at Witnesses and his former employer, which may help them determine a motive.

Alsterdorf is a quarter in the Hamburg-Nord borough of the Hamburg, Germany. The name derives from the river Alster and its artificial lakes Außenalster and Binnenalster in the centre of Hamburg. In 2023 the population was 15,108.

Hamburg, officially the Free and Hanseatic City of Hamburg, is the second-largest city in Germany after Berlin and 7th-largest in the European Union with a population of over 1.9 million. The Hamburg Metropolitan Region has a population of over 5.1 million and is the eighth-largest metropolitan region by GDP in the European Union.

March 9 is the 68th day of the year in the Gregorian calendar; 297 days remain until the end of the year.