Quite a few followers gathered outdoors Celtic Park forward of the Outdated Agency recreation immediately regardless of a number of warnings to remain away.
Police say they’re “disenchanted” within the “small minority” of followers who congregated outdoors the stadium forward of the match, which Rangers received 2-0.
Whereas no arrests had been made, Police Scotland mentioned pyrotechnics had been launched.
The match was performed in an empty stadium resulting from Covid-19 restrictions.
Superintendent Stevie Dolan mentioned: “Regardless of there being no spectators, a policing plan was in place in case of any points outwith the stadium.
“Disappointingly, regardless of the golf equipment, Authorities and police asking individuals to do the precise factor and keep away, a minority of followers did collect close to Celtic Park forward of the match and pyrotechnics had been used.
“Our method all through the pandemic has been to interact with the general public, clarify the laws and steerage, and encourage compliance, solely utilizing enforcement as a final resort.
“We’ll proceed with that method, however we is not going to hesitate to make use of enforcement motion the place it’s needed.”
First Minister Nicola Sturgeon had beforehand warned followers to steer clear of the stadium, and mentioned it was “actually vital” for followers to not journey to attempt to watch the sport in pubs.
She mentioned on Friday: “I’m afraid that watching soccer, irrespective of how important it’d really feel to some, doesn’t fall into that important class.
“No one likes the truth that these restrictions should be in place however they’re very important to defending all of us and protecting us protected.
“So please adjust to restrictions – by doing that you can be enjoying your half in serving to us get the virus beneath management and also you’ll be serving to hasten the day once we can all watch and benefit from the issues that we love doing, whether or not that’s soccer or the numerous issues that we discover ourselves not in a position to do usually.”