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The incident happened at around 5.15pm on Thursday 20 August when the victim, a 20 year old man, was punched in the face and suffered bruising to his mouth.
A 24 year old man was arrested in connection with the incident and has been released on police bail pending further enquiries.
Anyone who witnessed the incident or who has any information about it is asked to contact North Yorkshire Police.
Dial 101, press option 1 and pass information on to the Force Control Room, or email Michael.firstname.lastname@example.org
Alternatively, Crimestoppers can be contacted anonymously on 0800 555 111.
Please quote reference number 12150145881 when passing on information about this incident.