They've also been charged with a number of other offences.
Two teenagers have appeared in court in Laois charged with offences relating to a burglary and fire at a farm.
They also faced charges in connection with a number of other incidents in the days prior to the fire.
Portlaoise Gardai attended the scene of the incident in Mountmellick on Tuesday morning and arrested the two suspects.
Following further investigations, a series of other crimes were uncovered from early June.
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