A man was punched in the face, and a woman was also assaulted in Culver Street car park on Friday evening (21st April) in what is being described as an unprovoked attack.
Police are telling us that the incident happened between 8 and 9 pm in the evening, and the man suffered a cut to the bridge of his nose and eyebrow.
If anyone witnessed the incident or has any information, Wiltshire Police would like to hear from you.
Sgt Chris Noke said: "A man in his 20s was punched in the face by another man in what we believe was an unprovoked attack, causing a cut to the bridge of his nose and his eyebrow.
"A woman in her 30s was also assaulted, causing minor injuries.
"If you saw the incident or can help with our enquiries, please contact us on 101, quoting reference number 54230041783."