Six people were in the Dublin District Court last night over the series of recent security van robberies and other crimes.
Gardaí earlier arrested another person over the spate of ATM robberies and the kidnapping of a Dublin family in the capital over the past few months.
Officers said this brought to 23 the number of people being questioned over the kidnapping of the Richardson family and the subsequent robbery of around €2 million from the Securicor cash transit company.
The Criminal Assets Bureau has been investigating the bank accounts of the large number of people arrested in a big crackdown on armed robberies.
A senior Garda source said the operation was directed at a north Dublin gang in Coolock believed to be behind the spate of small and large armed hold-ups of cash-in-transit vans over the past few months.
The series of dawn raids at over 60 locations across Dublin on Wednesday was the largest operation of its kind for several years.
It involved up to 300 officers from the local stations, the Criminal Assets Bureau, the National Bureau of Criminal Investigation, the Garda Fraud Squad and the Garda National Bureau of Immigration.
The people were being detained under Section 30 of the Offences Against the State Act.
Gardaí had suspected that an insider was involved in the series of ATM raids.
It was confirmed last night that one of the men arrested was an employee of a security company.
All of the people are being held at different stations across the greater Dublin area and can be detained for up to 72 hours in total.
The raids on Wednesday morning were centred on houses and premises in north and south Dublin and Ashbourne in Co Meath.
Around €150,000 in cash was recovered, along with large quantities of cocaine, weapons and several luxury cars which had been purchased in the wake of the ATM robberies.
The crackdown came in response to the abduction of the family of a Securicor employee from their home at Ashcroft, Raheny, last month.
The gang took just over €2 million from the security van.