A 47-year-old woman was taken to hospital after being found with injuries on Pembroke Road, Pembroke Dock.
She was later discharged.
Police are investigating the incident which occurred in the early hours of Sunday, June 23.
A 32-year-old man has been arrested on suspicion of assault and released on bail pending further police enquiries.
Anyone with information that could help officers with their investigation is asked to report it to Dyfed-Powys Police, either online at: https://bit.ly/DPPContactOnline, by emailing [email protected], or by calling 101. If you are deaf, hard of hearing, or speech impaired text the non-emergency number on 07811 311 908.
Alternatively, contact Crimestoppers anonymously on 0800 555111, or crimestoppers-uk.org.
Quote reference: DP-20240623-044