Six people have been arrested on suspicion of illegal working at branches of an Italian restaurant chain in Carmarthen and Tenby.
Immigration Enforcement officers made the arrests at Florentino’s restaurants in the two towns, the Home Office has said.
Acting on intelligence, officers visited the Carmarthen restaurant in February and arrested four people they said had no right to work in the UK.
Following further intelligence last week, officers visited the chain’s Tenby restaurant and arrested two more.
The Home Office said three of the six had already returned to their home countries, with a fourth in the process of returning.
Of the remaining two, one has been placed on immigration bail subject to strict conditions while enquiries continue, and the other was released with a warning.
The department said work would now begin to establish who was liable for employing the individuals.
It said an employer found in breach of the law can be fined up to £60,000 per worker.
No business or individual has been found liable at this stage.
The four arrested in Carmarthen in February were two Romanian nationals, a Bangladeshi national and a Mongolian national, the Home Office said. The two arrested in Tenby this month were both Romanian nationals.
The arrests were announced as part of what the Home Office describes as a national drive to increase immigration enforcement.
Immigration Enforcement Lead for Wales, Richard Johnson, thanked officers for their professionalism during the operations.
He said teams in Wales were working “round the clock to ensure businesses play by the rules and those with no right to be in the UK are tracked down and returned at the earliest opportunity.”
The Home Office said enforcement activity had risen to its highest level on record, reporting more than 9,000 arrests across the UK in 2025.
In Wales, it said 1,320 illegal working visits were carried out last year, leading to 649 arrests.
The department also pointed to planned changes that would require companies hiring gig economy and zero-hours workers to carry out right-to-work checks, with new rules expected to extend those duties to the delivery sector.
The latest arrests follow a similar operation last year, when a Gower construction site was among hundreds raided in what the Home Office called its largest crackdown on illegal working.