Gardaí say they are investigating the circumstances surrounding the discovery of two bodies in Finglas in Dublin last night.
Emergency Services and gardaí were called to a house in the Heathfield estate in Finglas, a housing estate at the back of Cappagh Hospital.
The bodies of an adult man and a young girl were found in the house at around 8pm last night.
They believe they are a parent and a child who may be as young as six years old.
The scene has been preserved, the coroner has been notified, a State Pathologist has been called in and the Garda Technical Bureau has been alerted to carry out a forensic examination.
At this stage, gardaí are keeping an open mind in the case but there does not appear to be any sign of a break in or indication of any third party involvement.
However, they are stressing it is a very early stage in the investigation.
Gardaí are also to establish an incident room under a senior investigating officer and appoint a family liaison officer.