At approximately 3:45 am police received a report that a house was on fire.
Police and NIFRS attended and the fire was extinguished.
Damage was caused to the back door of the property.
A man and woman and two young children who were in the house at the time were not injured.
Detectives are appealing for anyone who witnessed this incident or anyone with any information that can assist with the investigation to contact them in Bangor Police Station on 101 quoting reference number 240 of 20/04/18.
Alternatively, information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime.