The incident took place in the early hours of Thursday morning.
Four people have been hospitalised after an incident of criminal damage by fire to a house in Westmeath.
The incident took place at around 12.50am on Thursday in Newtown Lawns in Mullingar.
Four people were in the house at the time and were brought to Mullingar General Hospital for treatment of non-life-threatening injuries.
Any person, including road users and pedestrians, who was in the Newtown Lawns and surrounding area of Mullingar between 12:15am and 1:15am on 12th June and who observed any unusual activity, is asked to contact Gardaí.
Any road users or pedestrians who were travelling in the area during this time and who may have camera footage (including dash cam) are asked to make this available to Gardaí.
Gardaí are also appealing for information on any person with unexplained burns or who has presented for medical advice or treatment for burns since the early hours of Thursday 12th June.
Anyone with information is asked to contact Mullingar Garda Station on 044 9384000, the Garda Confidential Line on 1800 666 111, or any Garda Station.
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