A man and woman were seen to be having a verbal argument which turned into a physical altercation shortly after 8.30am yesterday morning, October 19, outside the Co-op in Portway, Old Sarum, Salisbury.
Police are appealing for witnesses.
The man is described as white, between 20 and 25 years old, wearing a dark T-shirt and jeans. He also had a stretching earring in his ear.
The woman is described as mixed-race, between 20 and 25 years old, wearing dark clothing.
Officers arrested a 22-year-old man on suspicion of drug driving. He was taken to custody at Gablecross Police Station and released under investigation while enquiries continue.
Anyone with information should call PC Howard Oakley on 101, quoting crime reference 54200105036.
Alternatively you can call Crimestoppers anonymously on 0800 555111.