- 16 updates
Gwent Police and specialist officers are continuing to examine a site in Marshfield, Newport as part of an inquiry into allegations of slavery and servitude.
More than 100 officers were involved in raids at Marshfield, a flat in Cardiff and a house Penhow, Monmouthshire, on Monday morning.
Four people remain in custody.
A police spokesperson said a man who is receiving medical care after being taken from the Marshfield site yesterday is now believed to be a Polish national.
Officers using specialist equipment are examining land around the Cariad Farm site in Marshfield, Newport.
The search - prompted by suspicion a body has been buried there - is expected to last for several days.
Gwent Police say the investigation was prompted by the discovery of a 43 year old man living at the Marshfield site who had been reported missing thirteen years ago.
A force spokesperson said evidence had suggested people were being kept in poor conditions at the Marshfield site and forced to work for no pay.
A man "of Eastern European origin", whose age is unknown, has been taken for medical treatment.
Four people have been arrested in a series of human trafficking raids across South Wales.
More than 100 police officers and staff took part in raids in Cardiff, Penhow in Monmouthshire and the Marshfield area of Newport.
The arrests include a 66-year-old man and a 44-year-old from the Marshfield area, along with a 36 year old man from Cardiff and a 42 year old woman from the Penhow area.