Slavery inquiry: Four people arrested in south Wales
23 September 2013 Last updated at 13:57 BST
Four people have been arrested as part of an inquiry into slavery and servitude.
A team of 100 police officers raided locations in Cardiff, Monmouthshire and Marshfield and an Eastern European man has been taken to hospital.
The inquiry was sparked by the discovery of another man found living in poor conditions in Marshfield earlier this year.
Officers have also said they are investigating if a body has been buried at the site.