Eight immigrants have been arrested following a raid at a recycling depot.
The raid was carried out by about 10 officers acting on intelligence earlier.
Six people were arrested at the depot while a further two arrests were made at a house.
The majority of those arrested are thought to have entered the UK legally before allegedly working without the right to do so. One is alleged to have worked while underage and all are alleged to have been working for less than the minimum wage.
The recycling depot could face fines up to £45,000 per worker if it is found to have breached employment rules.
Officers found passports for all those detained at the recycling depots during the house raid.
Murad Mohammed, head of West of England Immigration Enforcement, said locating the passports will facilitate the “immediate removal” of any illegal workers “back to their home country”.
“Some individuals will have overstayed the time limit for which they’re allowed to be in the UK – so they’re overstayers,” Mr Mohammed said.
“Other individuals will be allowed to be in the UK but not to work”
