Sons live primarily with Australian Father.
Swedish Mother has two court-ordered visits with Sons per year in accordance with the Hague Convention on the Civil Aspects of International Child Abduction.
Sons advise Father that Mother does not intend to return Sons to Father in Australia.
Sons go to Sweden for their most recent visitation.
Sons do not return on schedule.
Now the Australian Family Court has prohibited any further contact between Sons and Mother.
Unfortunately, that is not very helpful at this point.
Australia issues an arrest warrant for Mother and alerts Interpol of the incident.
From January to October, 121 Australian children were abducted from Australia.
Read more in this [Australian] Age article: Missing in Sweden: Melbourne father’s dash to find sons and this [Australian] Age article: Man looks for missing sons in Sweden.