Published Monday, 24 March 2014
Those arrested are being removed from the country. (© Getty)
Home Office officials raided the Mama Chef Chinese takeaway, on Prince Andrew Way, on Friday at 6pm, questioning staff over their right to work in the UK.
Two men, 19 and 22, and a woman, 35, were all found to have entered the country illegally.
A failed asylum seeker, 46, was also arrested.
They are currently in Home Office detention while steps are taken to remove them from NI.
The business now faces a fine of up to £40k.
A civil penalty of up to £10k per illegal worker found will be imposed unless proof is provided that the correct right-to-work checks were carried out.
Assistant Director Mike Golden, from the Home Office, said: "We are working hard to track down people breaking the UK's immigration laws and carry out regular operations across Northern Ireland.
"Illegal working is not a victimless crime. It defrauds the taxpayer, undercuts honest employers and cheats legitimate job seekers out of employment opportunities," he said.
"Information from the public can be a huge help in our work and I would urge members of the public with information about suspected immigration abuse to get in touch."
© UTV News