Six people have been arrested as part of a Gloucester-based money laundering investigation.
More than £50,000 cash was seized.
Warrants were carried out on Sandhurst Lane and near Kingsholm Road in Gloucester.
The South West Regional Organised Crime Unit say investigations continue.
Detective Inspector Peter Highway, from the unit, said: "The searches are still ongoing, with officers working to gather as much evidence as possible from the two properties."
Gloucestershire Police, Immigration Enforcement and Gloucester Council were also involved.
Detective Chief Inspector Neil Smith from Gloucestershire Police added: "The work today shows how seriously we take organised crime, and that we will continue to work with partners to bring a stop to it."
A 57-year-old woman and 58-year-old man were arrested from the Sandhurst Lane property, where around £40k cash was seized, including a backpack containing bundles of notes totalling £20k.
At the second location, a 46-year-old man was arrested and more than £10k seized. All three suspects have been arrested on suspicion of money laundering.
A further three people were arrested by Immigration Enforcement.