John Swinney condemns ‘unacceptable’ Scottish cup final violence

Ch Supt Dolan added: “We are following a number of lines of investigation, including reviewing CCTV and footage on social media.

“I would like to thank the majority of fans for their conduct throughout the day.”

Glasgow City Council leader Susan Aitken said it was “particularly concerning” that disorder continues to happen around Old Firm matches.

She said: “I wrote to both Celtic and Rangers after similar incidents that took place around Hampden last year and they did nothing.

“The football industry seems to be quite happy to make money off these thugs while decent folk have to live with the consequences.

“That’s not good enough.”

A spokesperson for the SPFL, the Scottish Professional Football League, said authorities were clear that the use of pyrotechnics is “illegal and unsafe”.

They added: “The disruptive displays which took place before and during Sunday’s match were completely unacceptable and again led to a delay to the start of the match.”

The SPFL said it would liaise with Police Scotland and would consider Sunday’s match as part of ongoing investigations into the use of pyrotechnics.

The football body said it would also consider other matters including the “unacceptable encroachment” of fans onto the Hampden Park trackside area during the match.

The game went to extra time and penalties after finishing 3-3, with Celtic emerging victorious after winning the penalty shoot-out 5-4.