Eight immigration offenders from China have been arrested in Huddersfield.
All were detained in an immigration enforcement operation in West Yorkshire and seven of them are now to be deported.
The arrests came after a tip-off from the public.
Officers went to three houses in Huddersfield in the operation, which happened in late April.
The details have been revealed today.
The first raid was on Tuesday, April 26, at a house in Blacker Road, Birkby, when two men aged 48 and 51 were arrested after checks revealed them to be failed asylum seekers.
Both are now detained pending their removal from the UK.
On the same day, at a house in Alder Street, Hillhouse, a 35-year-old man was found to be a failed asylum seeker.
He was arrested and has since been temporarily released while his case is progressed. He will have to report regularly to the Home Office during this time.
The third part of the operation took place on Friday, April 29, at a house in Tanfield Road, Birkby.
Five men, aged 44 - 55, were arrested after checks found they were in the UK illegally. Three had overstayed their visas and two were illegal entrants.
All are now detained pending their removal from the UK.
A Home Office spokesman said: “These successful operations reflect our ongoing work to identify people abusing the UK’s immigration system.
“All of our operations are intelligence led and I would encourage people with detailed and specific information about illegal immigration to contact us.”
Anyone with information about suspected immigration abuse can report it at: https:// www.gov.uk/report-immigration-crime or call Crimestoppers on 0800 555 111.