Argentine authorities say a notorious former agent of Chile's secret police has been stabbed to death in Buenos Aires, the likely victim of a robbery.

An official with Argentina's security ministry confirms a cash box is missing from the apartment of Enrique Arancibia Clavel, whose body was found Thursday.

The official said Friday that Arancibia Clavel ran a taxi business with four drivers and kept money in his apartment instead of a bank.

The official spoke on condition of anonymity because he is not authorized to be quoted by name.

Arancibia Clavel was sentenced to life in prison for organizing the 1974 car bombing of former Chilean army chief Carlos Prats. He was later freed by Argentina's courts.