A couple and two young children have escaped injury after an alleged arson attack in Lurgan.
A 26-year-old man is currently assisting with police enquiries after the incident on Friday.
The front door and hallway of the house were damaged as a result of the fire, which was reported at around 11.45pm.
Police say the family were not injured but were left shaken by the ordeal.
Police are appealing for anyone who witnessed the incident or who has information that can assist with the investigation to contact detectives in Lurgan on 101 quoting reference 1521 09/11/18.
Alternatively, information can be provided anonymously to the independent charity Crimestoppers on 0800 555 111.