The Bulgarian Interior Ministry said police detained about 40 people for public disorder offenses before and during the final of the Bulgarian Cup on Wednesday evening.
The ministry added that 19 people were detained when clashes broke out in central Sofia ahead of Lokomotiv Plovdiv’s 1-0 victory over rival Botev to win their first championship since winning the league title in 2004.
The confrontations between the two teams are linked to a long history of violence.
Lokomotiv’s two games in the league ended in the first half because of a problem among the fans.
Five years earlier, a big fight broke out between players and coaches during a league match won by Botev.