Celtic have been hit with a fine of €15,000 after their fans were reported for “illicit chanting” during the Europa League match against Rennes last month.
UEFA’s control and disciplinary panel imposed the fine after the match delegate was informed of pro-IRA chanting by the Strathclyde police match commander on November 3.
The fine was announced by the European governing body this afternoon after a decision was taken on Friday.
Celtic expressed their surprise at the charge when it was announced last month and said they would cooperate fully with any investigation.
The Glasgow club acknowledged notification of the fine, but will take time to decide whether to appeal.
A Celtic spokesperson said on the club’s official website, www.celticfc.net: “We received notification of the fine this afternoon with no detail.
“The club is currently considering its position."
Celtic beat Rennes 3-1 and continue their Europa League campaign against Udinese in Italy on Thursday.
Earlier this month Celtic escaped Scottish Premier League action over pro-IRA chanting, the league ruling the club had taken all reasonable action to prevent such “unacceptable conduct”, which was reported by police following a goalless draw against Hibernian on October 29.
The lack of action is consistent with the league’s stance that clubs should not be punished for the behaviour of fans if all reasonable measures had been taken to prevent it and deal with it.
But UEFA have been more willing to punish clubs and national associations in similar instances.
The European governing body have fined Rangers for “discriminatory” behaviour on three occasions, the latest offences also prompting a one-match travel ban on supporters.
The Ibrox club argued they had done everything possible to halt the singing.
Celtic boss Neil Lennon in May urged fans to stop pro-IRA chants and Bhoys chief executive Peter Lawwell made a similar plea in September after the club were “inundated” with complaints from their own supporters following a 2-0 defeat by Hearts at Tynecastle.
Lawwell recently said: “Chants glorifying the Provisional IRA are totally unacceptable.
“One, it is wrong, and it is an embarrassment to the club and an embarrassment to the majority of supporters.
“We have dealt with it at Celtic Park and we will do all we can to make sure it doesn’t happen home or away.”
Lennon has said: “We are better than that as a club and we always have been, we just don’t need it.
“We are and always have been a club open to all and we do not have issues around sectarianism.
“We have our own values and traditions but they do not include these chants. We don’t want them at matches and they must stop.”