Police are trying to trace a man who may be able to help them with their investigation after a Stagecoach driver was attacked at Preston Bus Station.
The incident occurred on July 13 on Tithebarn Street.
An image released by police shows a man with dark hair wearing tinted sunglasses carrying a paper bag.
He appears to be wearing light-coloured jeans, a dark leather-type jacket and a blue polo shirt.
A police statement read:
"Can you help? We'd like to speak with this man in relation to an incident on 13th July 2019 at the Bus Station on Tithebarn Street where a stagecoach bus driver was assaulted."
Anyone with information can call 101 or email email@example.com quoting 04/128141/19.
Information can also be passed anonymously via Crimestoppers on 0800 555 111.
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