"They have been arrested for attempted blackmail," Per Kristian Klausen, head of the police investigation, told the Fædrelandsvennen local newspaper.
"They tried to blackmail family members by using a fictional kidnapping."
The trio consists of two women aged 18 and 21, and a 22-year-old man, all of whom hail from Kristiansand on the southern tip of Norway.
While the police declined to specify how much money the three accomplices had tried to get their hands on through the faked abduction, they expressed their disbelief at the plot.
"I have never seen anything like it," Klausen said