HŠK Zrinjski Mostar is a professional football club, based in Mostar, Bosnia and Herzegovina. The club plays in the Premier League of Bosnia and Herzegovina, and has been one of the top teams in the country over the last few years. With six championships won in the Premier League of Bosnia and Herzegovina, Zrinjski is one of the best and most successful football clubs in Bosnia and Herzegovina. The club plays its home matches at Stadion pod Bijelim Brijegom in Mostar. Zrinjski's fans are called Ultras. Ultras group from Mostar was founded in 1994. The club was founded by Croatian youth in 1905 and is the oldest football club in Bosnia and Herzegovina. After World War II, all clubs that had participated in the wartime Prva HNL were banned in the Socialist Federal Republic of Yugoslavia, Zrinjski being one of them. The ban lasted from 1945 to 1992. The club was reformed after the independence of Bosnia and Herzegovina. It played in the Herzeg-Bosnia First League until 2000 when it joined the Premier League. In 2005, Zrinjski celebrated its first championship crown in the Premier League of Bosnia and Herzegovina. Today the football team is part of the Zrinjski Mostar sport society.