"I was briefly notified that Petrac's appeal was quashed and that the Supreme Court upheld the ruling of the local court in Corfu to extradite Petrac to Croatia," the Zagreb-based lawyer Marijan Pedisic told Hina on Tuesday, adding that he was not familiar with other details of the ruling.
Asked which steps the defence team was planning to take, Pedisic said it was too early to speak about that.
Another lawyer for Petrac, Greek attorney Georges Alfantakis, has said that he will ask the European Court of Human Rights to see that the execution of the ruling is postponed, the France Presse agency said.
The Greek lawyer claims that his client is a victim of "a political process".
The Croatian authorities and media consider Petrac to be one of the organisers of a network helping runaway Croatian General Ante Gotovina to remain at large. Gotovina has been on the run since July 2001 when the International Criminal Tribunal for the former Yugoslavia unsealed an indictment charging him with war crimes.
The 50-year-old Petrac was arrested on an international warrant in the Greek port of Igoumenitsa on 31 August this year for possession of a fake passport. He had been on the run since the abduction of General Vladimir Zagorec's teenage son in February 2004. A few days after his apprehension, Petrac was sentenced by a Greek court to five months in prison for possession of a fake passport and for illegally entering Greece.
Croatia has requested Petrac's extradition on the basis of a ruling by the Zagreb County Court which found him responsible for the abduction of Zagorec's son and sentenced him in absence to six years in prison.
In the meantime, Petrac sought political asylum in Greece before a local court. The proceedings are still under way.
A final ruling on Petrac's extradition is to be made by the Greek justice minister.