It follows an incident over the weekend, which saw a large police presence at North Dock and according to some bystanders the presence of the police helicopter during a search for the man.
In a statement Dyfed-Powys Police said:
“Dyfed-Powys Police attended the North Dock area to a report that a man had started a fire and may have injured himself. A search of the area was conducted and a 44-year-old male was arrested.
“Following interview Gary John Grove from Ystradgynlais was charged with Arson and 4 counts of Criminal Damage to property and will appear at Llanelli Magistrates Court on Monday 18th January 2021.”