An investigation is under way after a petrol bomb attack in Drogheda overnight. 

It happened at a house in the Rathmullan Park area at around 1.30am. 

The occupants of the house were treated for smoke inhalation.

This is the third petrol bomb attack in the past week in Drogheda. 

A man in his 20s was also injured in a shooting, all linked to the ongoing feud in the town.