A member of staff at McDonald's suffered facial injuries after asking a group of men to leave as the restaurant was closing.
Police are investigating the alleged assault, which took place at the McDonald's restaurant in Parc Trostre, Llanelli, at around 11.30pm on Saturday, July 11, although they are only releasing the details now.
The incident saw four men "causing a nuisance" in the car park as the restaurant was closing before becoming verbally abusive when asked to leave.
One of the men is said to have assaulted a member of staff, causing them facial injuries.
Dyfed-Powys Police has released an image of a man they are trying to identify, who may have information that could help the investigation.
A spokeswoman for the force said: "We are investigating an allegation of assault which occurred at the McDonald's restaurant car park, Trostre, Llanelli, at approximately 11.30pm on July 11th 2020.
"Four males were causing a nuisance in the car park as the restaurant was closing.
"When asked to leave the males became verbally abusive and one of the males assaulted a member of staff causing facial injuries.
"Officers have carried out all possible lines of enquiry, and are now appealing for help from the public.
"They would like to identify the person in the CCTV image, who may have information that could help the investigation."
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Anyone who knows who may be able to identify the person in the CCTV image is urged to contact police, quoting crime reference DPP/0011/02/07/2020/01/C.
