Dyfed Powys Police are appealing for information after a man was assaulted near St Davids Close and Llys Glan-y-mor in Llanelli between 9pm on Saturday 10 April and 1.30am on Sunday 11 April.
A 45-year-old male was taken to hospital with facial injuries.
The man responsible for the attack is described as white, of medium build, around 5 foot 8 inches, between 17 and 20 years of age with short mousey coloured hair.
He was carrying a white carrier bag with what looked like bottles of alcohol inside and was accompanied by another man.
Officers are appealing for help from the public to identify the people in the CCTV image, who may have information that could help the investigation.
Anyone with more information about the attack are asked to get in touch with DC 904 Harris of Dyfed Powys Police Llanelli CID
(Lead image: Google Maps)