Up to 1,000 homes have been affected by an infestation of flies in Llanelli.
Some have described the invasion as "absolute hell". There's been no explanation for what's causing the problem. A sample has been tested by an external pest control company which has identified them as a common house fly.
Amanda Carter is a resident of Llanelli and says she is so fed up of the pests she's organised a public meeting which will take place on Monday.
Carmarthenshire council say they are continuing their investigations to find the source of a fly problem in parts of Llanelli.
Cllr Philip Hughes, executive board member for public protection, said: “Test results have identified that this is a common house fly, which unfortunately makes it very difficult to identify the source. We are, however, linking in with an external agency who will be sending expert technicians down as soon as possible to further assist our officers on the ground with trying to identify the source."
Residents are being advised to keep food in containers, to clean work surfaces, keep windows closed when possible and to treat areas with household pesticides.