Police have released CCTV of a man after a firework was thrown at officers following a Celtic match.
The incident happened at around 10pm on February 14 after the Europa League match between Celtic and Valencia finished at Celtic Park.
The firework was thrown after the Spanish side's 2-0 win.
The man is described as being about 6ft tall, slim build with 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.
Police Scotland are now appealing for anyone with information about the identity of the man in the photograph to get in touch.
Information can be provided to police via 101, or passed on anonymously to Crimestoppers on 0800 555 111.
