DYFED-Powys Police are investigating a report of a man who followed two females from East Gate Llanelli to the Swansea Road area between 3.30am and 3.45am on Saturday, January 14.
The man is described as being approximately 5ft 5 in height, of stocky build, with short dark hair, and was wearing dark clothing.
A man has been arrested, however officers would still like to hear from anyone who was in the area at the time and might be able to help.
If anyone has seen a male in the area at this time matching this description, please contact DC 359 THOMAS at Llanelli Joint Investigation Unit on 101.