Searches are underway at a number of properties in Limerick, Clare and Tipperary as part of an investigation into the operations of criminal gangs in the area.
The searches - led by the Criminal Assets Bureau (CAB) - are taking place at homes and businesses in the three counties.
Officers are examining land sales and car sales organised criminal groups based in the region.
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Members of CAB - assisted by the Regional Support Unit and local gardaí - have seized documentation, mobile phones, devices and computer equipment.
Gardaí say no arrests are planned during this phase of the investigation.