67-year-old Aparecida Schunck had been held since Friday last week and was not harmed in the rescue conducted by the anti-kidnapping division.

Schunck is the mother of Fabiana Flosi, married to Ecclestone since 2012.

Her kidnappers had demanded a ransom of $AU48.75 million, reportedly the highest ransom demand in the country’s history.

In 2012, a dental technician threatened to kidnap his daughter Tamara in a $AU400,000 plot.

The man was jailed for five years