UEFA have opened disciplinary proceedings against Celtic over alleged fireworks and illicit banners in the crowd against Lazio.
The Hoops hosted the Italian side in Glasgow in their second Champions League game last week.
A Pedro header in the 96th minute was the difference between the sides as Lazio secured all three points with a 2-1 win.
Celtic have already been penalised for fireworks let off in the away end during their game against Feyenoord in Rotterdam on September 19.
The club were fined £23k for that incident and could now face a heavier fine for the Lazio game.
Pyrotechnics were let off and a banner reading “Antifascist Glasgow Celtic” including an Italian curse word and images depicting former fascist dictator of Italy Benito Mussolini’s death was also flown.
The incident has been referred to the UEFA Control, Ethics and Disciplinary Body for consideration.
A statement from the game’s governing body in Europe on Thursday said: “Disciplinary proceedings have been opened following this match for throwing of fireworks and illicit banners.
“The UEFA Control, Ethics and Disciplinary Body will decide on this case in due course.”
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