THREE car washes, a hairdressers and a takeaway were raided on Wednesday in a multi-agency operation headed by Redditch Police.
The operation was aimed at tackling issues of modern slavery, exploitation of vulnerable people, human trafficking, and illegal working as well as the state of accommodation above the businesses where employees resided.
Compliance with fire, licensing and business regulations were also targeted.
During the course of the visits Home Office Immigration made three arrests for immigration offences.
Hereford and Worcester Fire & Rescue Service issued advice and notifications for improvement in fire safety and Redditch Borough Council and and Worcester Regulatory Service are reviewing the water waste disposal management at the three car washes.
The police said the co-ordinated visits were to tackle a range of issues with the aim of protecting people from harm.
Redditch Safer Neighbourhood Team Inspector Mark Chappell said: “We received information from the community about some of the establishments concerned in our visits and acted upon this with our partners.
“These visits demonstrate the effectiveness of our partnership working in Redditch and the successful interventions which ultimately protect members of our community.
“It is important that people running businesses in Redditch comply with the law, fire safety and council regulations for operating businesses.”