Fans to face tight security at Sofia derby
"1,355 policemen will be on duty for the match," Sofia police chief inspector Anton Zlatanov told a news conference on Thursday. "We expect around 30,000 fans at the stadium."
Zlatanov added that streets around the Vasil Levski national stadium will be closed several hours before kickoff as additional precautionary measures.
Outbreaks of violence have been on the rise in the Balkan country and matches between CSKA and Levski -- the two most popular clubs -- have recently become bad-tempered affairs.
A 30-year-old man was killed after the game in 2000 while hooliganism and arrests have been rife since.
CSKA lead the standings with 62 points from 25 matches, followed by Levski on 58.