The tour bus of the German football team Borussia Dortmund was attacked with roadside bombs in Dortmund, Germany. Three bombs exploded as the bus ferried the team to the Westfalenstadion for the first leg of their quarter-final against Monaco.

Ballspielverein Borussia 09 e. V. Dortmund, often known simply as Borussia Dortmund or by its initialism BVB, or just Dortmund by International fans, is a German professional sports club based in Dortmund, North Rhine-Westphalia. It is best known for its men's professional football team, which plays in the Bundesliga, the top tier of the German football league system.

On 11 April 2017, the tour bus of the German football team Borussia Dortmund was attacked with roadside bombs in Dortmund, Germany. Three bombs exploded as the bus ferried the team to the Westfalenstadion for the first leg of their quarter-final against Monaco in the UEFA Champions League. One of the team's players, Marc Bartra, and a policeman were wounded, but the strengthened windows of the bus prevented casualties.

An improvised explosive device (IED) is a bomb constructed and deployed in ways other than in conventional military action. It may be constructed of conventional military explosives, such as an artillery shell, attached to a detonating mechanism. IEDs are commonly used as roadside bombs, or homemade bombs.

Dortmund is the third-largest city in North Rhine-Westphalia, after Cologne and Düsseldorf, and the ninth-largest city in Germany. With a population of 614,495 inhabitants, it is the largest city of the Ruhr as well as the largest city of Westphalia. It lies on the Emscher and Ruhr rivers in the Rhine-Ruhr Metropolitan Region, the second biggest metropolitan region by GDP in the European Union, and is considered the administrative, commercial, and cultural centre of the eastern Ruhr. Dortmund is the second-largest city in the Low German dialect area, after Hamburg.