The owners of a 'haunted' house said they have been left so terrified by mysterious screams they refuse to step back inside.
Alan and Christine Tait said their home was hiding a dark secret, as they have been plagued by sinister noises since 2018.
In June of that year, Christine was making a coffee in the kitchen at the house in Ammanford, Carmarthenshire.
But while she was stood over the kettle, she became convinced she could hear strange noises.
In the weeks that followed, the couple were disturbed by the sounds of women and children screaming, heavy knocking, and men talking a foreign language.
Although they had lived in the house for 11 years, within weeks the couple left and vowed never to return.
The couple, who moved into a camper van, set up recording devices around the house to investigate the noises.
"It was like a flushing noise that I heard first," Christine told Wales Online.
"I told Alan about it and that I couldn't figure out where it was coming from. He left his phone in the bathroom with the recorder on to try to pick up the source of the noise, and then we could hear a machine running.
"We started to record all over the house, and we picked up the sounds of chains, a motorbike starting, and people screaming."
The Taits, both 62, soon realised the noises were subterranean and appeared to be coming from underneath the basement that sits below the kitchen - they even got police round who couldn't find the source of the noise.
But Alan was not deterred.
He dug two 1.5 metre channels into the walls and put recording equipment inside.
What he found, he said, was horrifying.
From "a woman screaming, sexual sounds, dogs barking, a motorbike, and a car horn", the chilling noises amounted to hundreds of hours of recordings.
The couple accumulated hundreds of hours of recordings of the different sounds, all of which they claimed were coming from beneath their house.
The pair now travel around the UK, warning others about their ordeal and trying spread the word about "what is going on" in Ammanford.
"Hundreds of people have been in touch with us and agreed that this needs to be properly looked at," said Alan.
"All I really want is an explanation. Why are there people screaming? There must be something going on. We have placed microphones all over the place because we wanted to prove or disprove what we were hearing.
"Were these noises coming from the main road? Were they coming from a park?
"We put microphones at the front of the house, at the back of the house, inside and out, and in the basement.
"The device we left in the basement picked up the screaming and other noises. The other devices, which were recording simultaneously at the front and back of the property, picked up nothing at all."
The couple sent Wales Online a key to the house, but warned reporters would be entering the property at their own risk.
Despite being in a busy town centre, the property is hidden down a narrow and lonely alleyway. The street is filled with shops and other commercial properties, bar one empty building next door that is up for sale.
The kitchen sits directly above the now sealed-off basement. There is no direct access to the underground space, other than down a small hole with nine feet of darkness below it.
Although the journalists left a recording device at the edge of the hole for several hours, the only sound picked up was them leaving the property.
However, the Taits - who recorded inside the walls of the basement, rather than above a hole in its ceiling - are adamant something is going on and have set up a petition to demand authorities investigate further.
They claimed police were ignoring their concerns and that "this matter needs an urgent, full investigation".
Dyfed-Powys Police confirmed it had received correspondence from Alan, and officers attended the area in November last year. They did not find evidence of wrongdoing.
But the Taits believed there were men, women and children living, sleeping and working underneath the house.
Alan believed there were "quite a lot of people down there" and is concerned it could be connected to people trafficking as well as drug manufacturing.
The couple refused to return to Ammanford and said they were fearful for their own safety. They would not say where in the UK they currently live and did not want photographs of themselves in the press.
"We're travelling around the country handing out posters and fliers about what we think is going on," said Alan.
"We want as many people as possible to know about this so that the police are urged to carry out a more thorough investigation.
"We don't want to go back until the matter has been resolved.
"I think we're dealing with a serious criminal gang here, and I think our lives could be in danger if they knew where we were."
