Police have issued a photograph of a man from Pembrokeshire who has been missing since Wednesday.
Mr Davies is said to be suffering from depression
Gwyn Davies was last seen near his home in Glebelands, Hakin.
Mr Davies, 61, is 5ft 2in with short dark hair and glasses, and was wearing a navy jacket, navy corduroy peaked hat, and light coloured jeans.
Mountain rescue teams along with the police and coastguards have carried out searches of the area, but have so far proved unsuccessful.
Dyfed-Powys Police searched the area using the force helicopter and dog handlers.
They were joined on Saturday by volunteer members of the Central Beacons Mountain Rescue Team, along with a dog handler from the South Wales Search and Rescue Dog Association.
They scoured the surrounding area for over 12 hours, but found no trace of Mr Davies. Huw Jones, deputy team leader of the Central Beacons Mountain Rescue Team said concern was mounting for Mr Davies, especially in view of recent heavy rain.
He said: "We predominantly searched the fields surround the village, of an area around eight sq km.
"We broke the area up into small patches, and covered quite a substantial amount."
Dyfed-Powys Police have appealed to anyone who has seen Mr Davies to contact them, and people were asked to check garden sheds and out-buildings.