A woman and her elderly parents escaped injury after an arson attack on their home near Benburb.
Detectives in Lurgan are appealing for information following the incident.
It is understood the attack took place sometime between 11.45pm and midnight on Wednesday.
The house – in the Ballytroddan Road area – was set alight and severe damage was caused.
Detective Constable Kelly Foley would appeal to anyone who has information about this incident or who may have noticed any suspicious activity in the area to contact detectives at Lurgan Police Station on 101, quoting reference number 14 on 08/09/016.
Alternatively, if someone would prefer to provide information without giving their details they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.