The Dinamo–Red Star riot took place at Maksimir Stadium in Zagreb, Croatia between the Bad Blue Boys (fans of Dinamo Zagreb) and the Delije (fans of Red Star Belgrade).

The Dinamo Zagreb–Red Star Belgrade riot was a football riot which took place on 13 May 1990 at Maksimir Stadium in Zagreb, SR Croatia, then part of SFR Yugoslavia, between the Bad Blue Boys and the Delije. The incident took place just weeks after Croatia's first multi-party elections in almost fifty years in which the parties favouring Croatian independence had won the majority of votes. The riot resulted in over sixty people wounded, including some stabbed, shot or poisoned by tear gas.

Maksimir Stadium is a multi-use stadium in Zagreb, Croatia. Named after the surrounding neighbourhood of Maksimir, it is one of the largest stadiums in the country with a current seating capacity of 25,912 and a maximum possible capacity of 35,423. It is the home stadium of Croatian club Dinamo Zagreb and has been used since 1990 by the Croatia national football team for the majority of international competitions.

Zagreb is the capital and largest city of Croatia. It is in the north of the country, along the Sava river, at the southern slopes of the Medvednica mountain. Zagreb stands near the international border between Croatia and Slovenia at an elevation of approximately 158 m (518 ft) above sea level. At the 2021 census, the city itself had a population of 767,131, while the population of Zagreb metropolitan area is 1,086,528.

Građanski nogometni klub Dinamo Zagreb, commonly referred to as simply Dinamo Zagreb, is a Croatian professional football club based in Zagreb. Dinamo play their home matches at Stadion Maksimir. They are the most successful club in Croatian football, having won twenty-five Prva HNL titles, sixteen Croatian Cups, еight Croatian Super Cups, and one Inter-Cities Fairs Cup. The club has spent its entire existence in top flight, having been members of the Yugoslav First League from 1946 to 1991, and then the Prva HNL since its foundation in 1993.