Slavery farm inquiry 'shocking', says Home Office
As police continue to search for human remains at a farm, the Home Office says the case serves as an "appalling reminder of the extent to which slavery has reappeared in our country".
Officers are using mechanical diggers to excavate a site between Cardiff and Newport.
Four people are being questioned following raids by anti-slavery Operation Imperial.
On Monday, a second man was found living in poor condition on the site.
Nick Palit reports.