Interpol Chile director Fernando Villegas said police took former judge Otilio Romano to Santiago's airport. He is now in the custody of Argentine Interpol agents and will be flown to the Argentine city of Mendoza.
Romano is accused of committing almost 100 human rights crimes while working as a prosecutor during Argentina's 1976-83 military dictatorship.
He fled to Chile in August 2011. Chile refused to grant him political asylum last year and he was placed under house arrest pending the extradition process.
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