Three people remain in custody following a day of action against the exploitation of field-workers in Cambridgeshire.
The 44-year-old man from March, a 27-year-old man from Wisbech, and a 27-year-old woman from Wisbech continue to be held at March Police Station.
Six people have been released on bail to return to a police station at a later date.
The trio were arrested at about 4am yesterday (15 October 15) at addresses in Wisbech, March and King's Lynn.
The operation was led by police and the Gangmasters Licensing Authority (GLA), and also involved the National Crime Agency (NCA), Fenland District Council, the Home Office and the Vehicle and Operator Services Agency (VOSA).
In total about 300 police and partner agency officers and staff were involved.
The police and GLA also attended the premises of March-based recruitment agencies Roberto Mac Ltd, and Slender Contracting Ltd, whose licences were suspended with immediate effect.
A reception centre was set up by Fenland District Council to accommodate victims or other workers who were supported by the British Red Cross and The Salvation Army. A total of 80 people were received at the centre, 40 of whom have been enabled to leave. Work continues there today.
The arrests come two weeks after a BBC investigation into the plight of workers in the Fens.
Eastern Europeans, mostly from Latvia and Lithuania, are employed to pick leeks across the region for UK supermarkets.
