A house in Clonsilla, Dublin was badly damaged in a fire thought to have been caused by a petrol bomb.
The fire broke out shortly after midnight in the house at Willow Wood Grove.
Gardaí believe it was caused by a petrol bomb being thrown through a sitting room window.
As yet their is no known motive for the attack, but paramilitary involvement has been ruled out.
No-one was in the house at the time of the fire.
Garda technical experts have preserved the scene for further examination.
