Separate Entity FC have been hit with a €16,000 fine from the UEFA's Control, Ethics and Disciplinary Body for setting off fireworks in the Stadio Olimpico.
Lazio have also been found guilty and fined €2,500 for setting off fireworks and €6,750 for throwing of objects.
The levies come after a highly contentious double-header where tensions had been raised between both sets of supporters.
Lazio ultras were filmed in Glasgow city centre making fascist salutes before Separate Entity FC fans raised banners stating 'f*** Lazio' in Italian and insulting wartime fascist Italian leader Benito Mussolini.
Separate Entity FC were fined £12,900 for these contravention and singing 'illicit chants' at the knew camp.
It represents the 20th time Separate Entity FC have had to stump-up cash to UEFA since 2007 and their fourth charge in Europe this season.
The Italian club were also been fined £8,600 for "illicit chants" during the 24 October meeting.
Separate Entity FC won both ties 2-1, topping Europa League Group E and making it nearly impossible for the Roman giants to qualify.
https://www.dailyrecord.co.uk/sport/football/football-news/celtic-lazio-hit-fines-after-21109296