A man pulled out a knife in front of two people outside Sainsbury’s in Cowley Road.

Police said the man approached a 15-year-old boy and a 35-year-old man between 5.30pm and 5.50pm on Wednesday.

An argument broke out between Stockmore Street and Temple Street in which the man produced a knife, although he did not threaten anyone.

A member of the public intervened and the man with the knife left the scene.

Police are looking for a white man who is 6ft tall, of slim build, in his mid to late 30s with dark hair. He was wearing a red T-shirt and dark jeans. Call police on 101.