Police are searching for an elderly lady who intervened in an attempt to calm a disturbance between a man and woman at a retail park.
Police have appealed for witnesses to an incident which is reported to have taken place in Anchor Retail Park in Hartlepool.
A woman and her daughter were in their navy Renault Megane when a man in a white taxi allegedly approached them.
He is then said to have brandished a metal bar while shouting aggressively at the woman.
An elderly lady attempted to calm the situation and we would appeal directly to her to contact us as she may have information which could help our inquiries.
A 41-year-old man was arrested on suspicion of harassment, on suspicion of affray and on suspicion of possessing an offensive weapon and he was released from custody while inquiries continue.
The incident happened at around 3.15pm on Sunday, May 7.
Anyone with information is asked to contact Cleveland Police on 101 or information can be passed anonymously to the independent charity Crimestoppers via their website at www.crimestoppers-uk.org or by phoning 0800 555 111.