10 January, 2019
"There have been both ransom demands and serious threats", Tommy Brøske, the police inspector leading the investigation, said at a press conference in Oslo on Wednesday morning.
Police have been investigating the case discreetly for several weeks but decided to make it public in the hope that someone would come forward with information, Broske said.
Investigators refused to confirm that amount but said they advised the family not to pay the purported kidnappers.
The paper also claimed the note said she would be killed if police became involved.
According to local newspaper VG, 68-year old Anne-Elisabeth Falkevik Hagen, the wife of Norwegian businessman Tom Hagen, has been missing for ten weeks, since October 31st of last year.
Sources have now indicated that a written message was found in the Hagen house, which demanded a $10 million ransom be paid entirely with the privacy-focused cryptocurrency Monero.
Police had no indication whether Falkevik Hagen was dead or alive.
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Those behind the abduction "have chosen to communicate digitally and we have had no other type of contact", Broeske said.
Mr Hagen, who is Norway's 172nd richest man and made his fortune in real estate and the energy sector.
Norwegian police confirmed that "a woman in her late 60s is believed to have been kidnapped from her home in Lorenskog", around 12 miles from Oslo and 31 miles from the Swedish border, but did not disclose her identity.
A lawyer for the family said they had not paid the ransom.
He said police had no suspects so far.
Norwegian broadcaster NRK says the couple live a "secluded lifestyle" and asked the public to get in contact if any suspicious activity was seen in woodland that surround the family home.
Kidnappings are rare in Norway, a Scandinavian nation of 5.3 million that prides itself on low crime rates.