They are said to have taken place during the early hours of Sunday, October 29.
A spokesperson for Dyfed-Powys Police said: ”As a result of a swift and coordinated response and investigation using specialist resources, a 25-year-old woman and a 32-year-old man, both from Llanelli, have been arrested on suspicion of robbery.
At this time, officers are not seeking anybody else in connection with the incidents.
We would like to thank the community for their support, for sharing our social media appeals, and for information that has been valuable to the enquiry.
Anyone with any information that could help as the investigation progresses is urged to call 101.”