The gang is suspected to be behind past petrol bomb attacks on homes and cars.
Drugs gangs being investigated over a fatal arson attack in Offaly are believed to have carried out more than a dozen firebombings.
Four year old Tadgh Farrell and his 60 year old grand-aunt Mary Holt died after the Edenderry home they were in was set alight by a petrol bomb on Saturday night.
The boy's grandmother, aged in her 50s, has been hospitalised with serious injuries after the incident in Castleview Park.
The Irish Independent is reporting that gardaí are probing the involvement of members of a local organised crime group who have been investigated over a spate of assaults, arsons and firearm-related incidents in the recent past.
The gang is suspected of carrying out more than a dozen petrol-bomb attacks on homes and cars in the region.
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