Two teenagers and three young adults were arrested on Thursday following an investigation into a number of recent burglaries.
Gardaí carried out searches on properties in Co Kilkenny and Co Waterford and Portlaoise on Thursday morning.
A teenage girl was one of the group arrested and is being kept in custody in Kilkenny Garda station.
Three men, aged 21, 28, 30, and one teenage boy, are in custody at various Garda stations in the areas.
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A Garda spokesman said property and items, believed to be stolen, were recovered during the searches.