Four men remain in custody at Ystrad Mynach Police Station following the execution of warrants at five addresses in the Cardiff and Bristol area.
Officers from Gwent Police’s Operation Imperial team, working with South Wales Police and Avon and Somerset Police, executed the warrants this morning, Monday June 30.
The Operation Imperial team is investigating alleged offences of slavery, servitude, forced labour, false imprisonment, kidnap and assaults.
Four men from the Rumney area of Cardiff have been arrested.
Detective Superintendent Paul Griffiths, who leads Operation Imperial, said: “All four arrests relate to two victims, both men, who are being supported by specially trained officers.
“The alleged offences we are investigating are extremely serious. Allegations from one of the victims cover slavery, servitude and forced labour and span a period of 26 years.
“Allegations from the other victim cover kidnap, false imprisonment and assault and span a lesser timeframe.
“Anyone with any information that could help is asked to call the Imperial team directly by dialling 01633 647174. Alternatively if someone has information and would rather not pass this directly to the Police then I would urge them to contact Crimestoppers, which is independent of the Police and guarantees complete anonymity on 0800 555 111.”