The Child Rescue Ireland Alert (CRI) has now been stood down.
Svetlana Murphy has been located safe and well in the Belfast area.
She is in the safe custody of the Police Service of Northern Ireland, and will be re-united with her family tonight.
An 18 year old male has been arrested by the Police Service of Northern Ireland and is currently in custody.
An Garda Síochána is not providing any further information.
An Garda Síochána is also appealing that the privacy of the family be respected at this time.
