A man was attacked and suffered serious head injuries near a city lap dancing club.
Preston Polices say the attack took place in Guildhall Street off Fishergate on Saturday 14 December.
It was only reported to police a fortnight after it took place.
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A man in his 20s was attacked near to Room 32 between 11.20pm and 11.30pm on that night.
The police are asking for witnesses to come forward as they continue to investigate.
Anyone who was in Guildhall Street and witnessed the assault or who has information should contact police on 101 quoting log 0564 of 28 December or email 6302@lancashire.police.uk
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