CSKA Sofia and Lokomotiv Plovdiv fans clashed at the Bulgarian Army Stadium before their match on Sunday.
Levski fans fought each other in the stands during their team’s match against Botev Plovdiv at the Botev 1912 Football Complex on Saturday.
Wednesday’s Bulgarian cup match between Spartak Varna and Levski Sofia was stopped for several minutes due to trouble in the stands.
Trouble flared at the Georgi Asparuhov stadium on Thursday as Levski didn’t progress to the second qualifying round of the Europa League.
A Bulgarian league match between Lokomotiv Plovdiv and CSKA Sofia was halted for 20 minutes on Sunday after a massive brawl broke out between rival fans.
Hebar Pazardzhik and Minyor Pernik fans fought on the terraces during their third division match on Saturday, halting play for 10 minutes.
Levski Sofia fans clashed with police in the stands during their Bulgarian Cup tie at Litex on Tuesday.
Trouble flared at Sunday’s Bulgarian third division match between Minyor Pernik and CSKA Sofia as fans from both teams tried to get at each other.