Celtic face a possible further UEFA sanction after a smoke bomb was thrown onto the pitch during the Champions League tie against Aston Villa.
The incident comes after a stern warning from UEFA earlier in the campaign over the use of pyrotechnics at matches.
Celtic received an immediate €20,000 fine over pyro set off during the match against Borussia Dortmund earlier in the league phase.
A one-match suspended ban was also issued to the club over the possibility of away supporters being locked out should a similar incident occur in the next two years.
Celtic had condemned the use of pyrotechnics after the UEFA punishment and issued a strongly-worded warning against further incidents over fears of being prevented from selling tickets for an away match.
At Villa Park, a smoke bomb was hurled onto the pitch during the celebrations of one of Adam Idah's goals in the 4-2 loss.
The matter now leaves Celtic chiefs facing a possible further sanction and away fan lockout ahead of the Champions League knockout play-off round tie against either Real Madrid or Bayern Munich.
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Dismissing a question on the incident and possible repercussions, Brendan Rodgers said: “I am not even thinking about that. I am just talking about football.”
The UEFA stance at the time of the initial fine and suspended ban, read: "To fine Celtic FC €20,000 and to ban Celtic FC from selling tickets to its away supporters for a total of one (1) UEFA club competition match, for lighting of fireworks.
"Said ban from selling tickets to its away supporters is suspended for a probationary period of two (2) years, starting from the date of the present decision."
A Celtic statement after the UEFA sanction in October 2024 read: "The club has received the decision issued by the UEFA Control, Ethics and Disciplinary Body following the match against Borussia Dortmund, in which the Club has been sanctioned, again, for the lighting of fireworks by a small number of individuals attending the match.
"The decision provides that, not only has the club received a fine of €20,000, but also that, if such behaviour is repeated at a match in the next two years, the club will be prevented from selling tickets to supporters for one away match in UEFA club competitions.
"The club has been very clear, over a number of years, that the use of fireworks and pyrotechnics at matches is prohibited, and presents risks to supporter safety and to the Club under the applicable regulations.
"It is hugely disappointing, therefore, that the conduct of a very small minority has led to this decision, which could potentially have such a negative and damaging impact on the team and Celtic supporters wishing to attend an away match to support the team."
