Six people were arrested earlier today in Nottingham and Derby over allegations of fraud relating to automatic enrolment.
It is the first time anyone has been arrested for auto-enrolment fraud.
The arrests were part of a joint operation involving Derbyshire and Nottinghamshire Police, The Pensions Regulator and the Employment Agency Standards Inspectorate.
In Derby three men aged between 28 and 38 were arrested, while a 31-year-old woman was arrested after voluntarily attending a police station in the city.
A 35-year-old man was also arrested at a business in Nottingham city centre.
All the arrests were on suspicion of fraud and are part of an ongoing criminal investigation into allegations of wrongdoing relating to auto-enrolment of staff into workplace schemes and underpaying workers.
The Pensions Regulator declined to comment further.
Last week, TPR published the first figures showing the number of times employers have questioned the regulator’s auto-enrolment enforcement action.
There were 379 reviews of statutory notices handed out by the regulator for breaches of auto-enrolment duties up to September 2015.
Of these, 279 resulted in the notice being “revoked, substituted or varied”.