Police said three men shoved the victim into the luggage compartment of a black Mercedes before driving away from the scene shortly after 7am, broadcaster NRK reports.
“We have good contact with the owner of the car, and our preliminary assessment is that this an internal dispute in a criminal environment,” Oslo police investigator Finn Belle told news agency NTB.
He added that the owner of the vehicle is known to the police, though they have not yet found the victim of the abduction.
Police have spoken to several witnesses, one of whom reported shouting at the men to stop before they quickly closed the boot of the car and drove away.
“I heard hysterical screams from the man who was kidnapped. I saw that they beat him and forced him into the boot,” one witness told NRK.