Detectives from PSNI Organised Crime Branch are questioning five people arrested in Ballymena and Scotland on Wednesday as part of an ongoing proactive investigation into money laundering and insurance fraud.
The five were among seven individuals arrested.
Six people were arrested in the Ballymena area - three men aged 53, 31 and 45 and three women aged 50, 26 and 46.
A 52-year-old man was also arrested in Scotland. He was brought to Northern Ireland for interview.
In addition, a number of searches were carried out at various locations in Belfast, Antrim, Glenavy and Ballymena.
Last night, the 45-year-old man and 46-year-old woman were released on bail pending further enquiries.
Enquiries by detectives from Organised Crime Branch are expected to continue for some time.