Police carried out raids on five properties.
Derbyshire police believe the potential victims to have been trafficked into the UK from Latvia, according to the Derby Telegraph.
Three men, aged 32, 41 and 53, and three women, aged 31, 35 and 54, were arrested on suspicion of human trafficking offences.
Detective Chief Inspector Rick Alton, for Derbyshire police, said the force has been working with authorities in Latvia. “We have been working very closely with Latvian authorities on this case and we’re grateful for their support," he said.
Officers suspect that the men have been working for “very little pay” and “have not had access to bank accounts set up in their name”.
All the involved people are Latvian. Among the victims were nine men and one woman, all adults. Latvian police are on-site cooperating with the British police, State Police representative Armands Luberts told Latvian Radio.