It was before arranged fight between 2 groups of fans of Partizan and Red Star at the stdium of FC Zarkovo (club from Belgrade, I think 4th divison) . It was arranged fair fight 8 on 8 (only hands). But, there were 9 fans of Partizan and 12 fans of Red Star. So fight begun and even outnumbered group of Partizan fans defeted group of Red Star fans in fair fight, but 1 Red Star fan took knife and killed poor Sale. He is 4th killed Partizan fan by knife in last 1,5 year.
About Juzni Front. There were lot of problems, missunderstandigs etc. and just few guys were doing all jobs about organisations, travels, tickets and everything else so they decided to finish with fan club.