"The further procedure for the extradition is not within the remit of the Justice Ministry. Those are technical details within the remit of the Interior Ministry and the Zagreb office of Interpol," the spokeswoman said.
Last week, Kalinic, who holds both Croatian and Serbian citizenship, waived his right to appeal the Zagreb County Court decision to hand him over to Serbia where he is sentenced to 30 years in prison for his involvement in the 2003 assassination of Prime Minister Zoran Djindjic.
He will be the first Croatian national to be extradited to a foreign country.
Serbia sent a request for his extradition on 11 June, three days after he was wounded in a mafia-style shoot-out at Rakitje pond outside Zagreb. After a passer-by found the wounded Kalinic, he was admitted to a Zagreb hospital and later he was transferred to the prison hospital in the Croatian capital.
Milos Simovic is suspected of having shot at him. Both Simovic, who was arrested by the Serbian police later in June, and Kalinic, are believed to be mobsters from the so-called Zemun underworld gang.