It happened on Church Avenue in Harrogate at 2.30pm on the 1 June 2018 and involved a man who was involved in a verbal altercation with another two men who were on bicycles.
Witnesses have said they have seen the man reveal a knife from his waistband and shown it to the two men on the bicycles.
The man is described as being slim, with black curly hair and an “olive” complexion. He was dressed in a black jacket, black trousers and black shoes.
The two men on the bicycles made off along King Edwards Drive and the other man made off on Church Avenue towards Bilton Lane.
Police are requesting the public’s assistance to help establish the full circumstances surrounding the incident.
They are appealing for information about the identity of all the men involved and a member of the public believed to have chased the man with the knife down Church Avenue.
Anyone with information that could assist the investigation should contact North Yorkshire Police on 101, select option 2, and ask for Brendon Frith. You can also email Brendon.Frith@northyorkshire.pnn.police.uk
If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.
Please quote the North Yorkshire Police reference number 12180096695.