CSKA Sofia fans stormed the pitch during their match against CSKA 1948 on Sunday as both sides battled it out for a place in the Europa Conference League.
With CSKA 1948 leading 2-0 in the 88th minute, a large group of CSKA Sofia fans invaded the Vasil Levski National Stadium pitch, throwing various objects and damaging advertising hoardings.
Both sets of players sprinted off the pitch and down the tunnel while riot police intervened in order to clear the fans off the pitch.
According to local media reports, three cops were injured and three men were arrested.
After about a 20-minute delay, play resumed.