The spokesman for the Serbian Prosecutor's Office for War Crimes, Bruno Vekaric, told Hina that the Norwegian minister of justice and the interior was now expected to decide whether Sireta would be extradited to Croatia or Serbia.
The 43-year old Serb national is suspected of taking part in the 1991 execution of Croatian prisoners at the Ovcara farm.
He was arrested in Norway, following an international arrest warrant issued by Croatia.
Sireta has already been sentenced by the Croatian judiciary to 12 years in prison for the murder of one prisoner of war in Vukovar.