A fight involving several people occurred at around 3.15am on Friday 27 September 2013, outside Rehab Bar in the area of Parliament Street and The Ginnel.
During the incident a man was seen brandishing a knife, which officers are making enquiries to try and locate.
A man suffered a minor stab wound and a woman sustained cuts to her hands in the incident.
Police believe that a number of people were in the area at the time of the incident and are appealing to anyone who witnessed the fight or saw a man with a knife to come forward with information.
Two local men and a man from Leeds were arrested at time, all have been released on bail as enquiries continue.
Anyone who can help officers with their enquiries is urged to contact North Yorkshire Police on 101 – select option 2 – and ask for Michael Crawshaw or Harrogate police.
Alternatively, information can be emailed to firstname.lastname@example.org
If you prefer not to give your name, Crimestoppers can be contacted anonymously on 0800 555 111.
Please quote reference number 12130167605 when passing information about this incident.