Officers from the Wales Extremism and Counter Terrorism Unit (WECTU) supported by Dyfed Powys Police executed a search warrant at an address in the Trimsaran area on Tuesday 11 June.
A specialist search continues after chemicals were found at the premises and a cordon remains in place. Armed officers were also deployed as a precaution to ensure the safety of officers and the public. There is no risk to neighbouring properties.
A 57-year-old man was arrested as a result of the initial search on Tuesday. He remains in custody on suspicion of being concerned in the commission, preparation or instigation of acts of terrorism, under section 41 of the Terrorism Act (TACT) 2000.
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