Police are appealing for more information as they investigate a serious assault that took place on May 1.
The incident took place at the entrance of St Enoch Subway Station in St Enoch Square, Glasgow at around 5.30pm.
Officers believe they have identified an individual who can help with their investigation.
READ MORE: Police launch murder investigation after 36-year-old man dies of serious injuries
The male is described as aged between 25-30 years of age, around 5ft 8ins tall and of medium build. He was wearing a red Adidas tracksuit top with distinctive white stripes on each sleeve, blue denim trousers and white trainers.
He was last seen heading south on St Enoch Square towards Howard Street.
Anyone who recognises him is being urged to contact Police Scotland on 101, quoting reference number AB00320522.
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