Some Indians are among a dozen suspected illegal immigrants employed with a food firm and arrested this week from East Midlands in the UK.
Official sources in London said that the workers -- both men and women -- were employed at Walkers Snack Foods in the Middlemarch Business Park.
Officers from the Border and Immigration Agency found the immigrants, who are from Ethiopia, Ghana, India and South Africa. It is suspected that they had used suspicious documents to get packing jobs at the company, the sources said.
They were held while attending a training day at a location away from the factory.
The officers detained 12 of the group who face removal from the country or prosecution if they are found to be in possession of forged passports.
Gail Adams, Border and Immigration Agency Regional director for Midlands and East of England, said: "The Border and Immigration Agency is determined to put a stop to illegal working in the West Midlands.
"We have teams visiting businesses across the region to make sure they are not breaking the law. Anyone found to be working illegally should know that we will seek to remove them from the country".
A Walkers spokesperson said: "We've worked very closely with the Home Office to assist them with their inquiry and are satisfied with the way it has been handled".