Four people face being deported after immigration officers raided two Blackpool takeaways over the weekend.
Officers were tipped off to illegal workers at Ruchi Indian Takeaway, on Squires Gate Lane, where they arrested two people on Saturday night.
A Bangladeshi man, aged 36, and a Bangladeshi woman, aged 39, were found working illegally when staff were questioned over their right to work in the UK.
On Sunday, officers visited Kings Chef Chinese Takeaway, on Hawes Side Lane, and arrested two Chinese men, aged 28 and 41, who were found working and had entered the country illegally.
All four were transferred to immigration detention pending removal from the UK.
The businesses now face having to pay £10,000 per illegal worker if they cannot prove they checked their employees had the right to work in the country.
Karen McDonough, head of the Lancashire Home Office Immigration Enforcement team, said: “These arrests are a clear warning to those in Blackpool abusing our immigration laws. There will be no slowdown in our efforts to arrest, detain and remove you from the UK.
“Employers who use illegal labour are defrauding the taxpayer, undercutting genuine employers and denying legitimate job hunters work.
“We are happy to work with employers who want to play by the rules but those which continue to flout them will face heavy financial penalties.
“I would urge anyone with detailed and specific information about suspected immigration abuse to get in touch.”
Anyone with information about suspected immigration abuse can contact visit www.gov.uk/report-immigration-crime or call Crimestoppers on 0800 555 111.