A CCTV image has been released after a firework was lobbed at police following the Europa League match between Celtic and Valencia.
Police believe the man in the picture could help with enquiries.
The incident occurred around 10.00pm on Thursday, February 14 at Celtic Park.
The man is described as being about 6’ in height, slim build, dark hair and pointed features.
He was wearing a distinctive dark tracksuit with reflective white flashes on the legs and shoulders, a white logo on the chest and black trainers.
Inspector Iain Sibbald, from Greater Glasgow Alcohol and Violence Reduction Unit, is appealing for anyone with information about the identity of the man in the photograph to contact him.
He said: "Anyone with information about the incident or who recognises the man should get in touch with me via at London Road Police Office via 101.”
Information can also be provided anonymously to Crimestoppers on 0800 555 111.
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