We previously reported that the Rangers squad was given a noisy send-off by fans gathered at Ibrox as they made their way to Parkhead.
The team faced city rivals in a tense showdown on December 30 which ended in Celtic winning 2-1, with goals from Paulo Bernardo, Kyogo Furuhashi and James Tavernier.
As the team prepared to travel to the East End, fans could be seen at Ibrox holding flares while fireworks could be heard from videos shared on social media.
Police Scotland has since revealed that they are carrying out enquiries into reports of people with pyrotechnics at Ibrox.
A spokesperson said: “We are aware of the matter and enquiries are ongoing.”
Meanwhile, the force revealed that there were no arrests made at Celtic Park surrounding Saturday’s game.
