Five suspected illegal immigrants have been arrested while working at restaurants in Belfast city centre, the Home Office said.
Officials, acting on intelligence, swooped on Safa Indian restaurant on Bank Street and detained a 25-year-old Nepalese man and three Bangladeshi men aged from 30 to 42 years old.
A 23-year-old Malaysian man was arrested at the House of Zen Asian outlet in St Anne's Square.
All five men were taken to a detention centre pending deportation.
Mike Golden, from the Home Office immigration enforcement team in Belfast, said he was determined to stamp out abuse of the system.
"We want the public to contact us if they have any information on businesses or people who are breaking immigration law," he said.
"Employers who take on illegal workers are both fuelling illegal immigration and undercutting businesses which play by the rules."
Both restaurants could be fined up to £10,000 for each employee if evidence does not show that the correct checks were made.