One bystander said that at least four police vehicles were at the scene and that armed officers were present.
They also reported seeing a police dog handler unit in the area.
The bystander reported seeing police officers breaking down the door of a property on Maes Golau at around 6.30pm.
Another bystander said that at least one person was arrested at the scene.
Llanelli Online contacted Dyfed-Powys Police for a statement and we are awaiting a response.
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