Police have launched a murder inquiry following the discovery of a body they believe to be that of a woman who disappeared while walking her dog.
Police have yet to officially confirm the murder victim is Kelly Hyde
The body, which had serious head injuries, was found in woodland just off a bridle path near Ammanford.
Kelly Hyde, 24, was reported missing by flatmates last Thursday evening and a body was found on Sunday morning.
She had dropped off her car at Brynteg Garage in Tycroes for repairs at about 0915 BST on Thursday.
The last positive sighting of her was when she was walking along Mill Terrace, close to where the body was found.
Det Supt Simon Powell, who is the senior investigating officer, said her dog was found wandering the area the following morning.
Scrappy the dog was found wandering in the area the next day
The body was found following an extensive search involving police officers and mountain rescue teams.
Det Supt Powell said the murder inquiry was at a very early stage but appealed for anyone who saw Kelly walking with her dog on Thursday morning to contact police immediately.
"It doesn't matter how insignificant you may think your information is, it may be an important part of the jigsaw to assist us with our inquiry," he said.
At the time she was wearing a black puffer jacket with a fir collar hood, black trousers and black boots.
An incident room has been set up at Ammanford police station and extra officers have been drafted into the town to reassure the community.
Police searching a lane near where the body was found on Sunday
Acting Assistant Chief Constable Gwyn Thomas said such incidents in the Dyfed-Powys area were extremely rare.
He said the force was "absolutely committed" to bringing the investigation to a quick and successful conclusion.
Police would not speculate on any possible motive but did say there had been no reports of any women having been approached or attacked in the area previously.
Officers hope to officially identify the body beyond later.
Anyone with information should call the incident room on 01267 221212.