Police and Immigration Service raids were carried out in Pembroke Dock on Tuesday, August 6.
Dyfed-Powys Police and the Immigration Service executed search warrants in Gordon Street, Water Street and Queen Street.
The raids commenced around 8.30 in the morning as residents noted an increased police presence in the town. Some doors were broken down to gain access to properties.
No arrests were made.
The Neighbourhood Policing Team visited the area providing reassurance to members of the local community.