A 27-year-old man has been arrested in connection with alleged offensive behaviour at the Celtic v Rangers derby on September 10.
The arrest comes on the back of a police investigation into several incidents of vandalism and offensive or anti-social behaviour, in particular the vandalism of the toilets in the away end at Celtic Park.
Police are appealing for more witnesses of the trouble, with detective inspector David Steward keen for anyone with mobile phone footage to come forward.
"We are continuing to investigate incidents of vandalism, disorder and any other associated criminality which occurred during the game," he said.
"Today specifically, we are requesting people with mobile phone footage of vandalism within the toilets of the away support section to contact us.
"I would ask anyone who witnessed or who captured this vandalism to contact police, as it may assist with our enquiry. I understand there were a number of images and video shared online of this and I would be keen for people to contact us directly with any information they may have.
"As part of the wider investigation, we have been viewing CCTV and obtaining footage from broadcasters in order to identify those responsible for disorder, vandalism and offensive or antisocial behaviour.
"We have a dedicated email address set up where people can contact police on the enquiry team, and that email address is CelticRangersDisorder@scotland.pnn.police.uk or contact the team at Shettleston Road police office on 0141 532 4846 or Police Scotland on 101."