Dovranic said that the Croatian ministry had not yet received any official notification that Radjen had been released on bail.
The Greek newspaper Kathimerini reported on Friday that Radjen, who has been working for several years in Greece as an assistant coach with PAOK Basketball Club, had been released from detention in Thessaloniki on Wednesday on EUR5,000 bail.
He was granted bail despite the Croatian request for his extradition, the newspaper said.
Radjen was arrested at the club's training session last month based on an international arrest warrant issued by the Croatian police in 2001.
Radjen, a 47-year-old ethnic Serb from Benkovac, is suspected of involvement in a massacre of nearly 50 Croatian civilians and soldiers in Skabrnja, a village inland from the central Adriatic city of Zadar, in November 1991. At the time he allegedly commanded a Serb military police unit that took part in executions of civilians.
Radjen was pardoned under the Amnesty Act for his involvement in the armed rebellion, but in 2001 Zadar County Court launched an investigation into him on suspicion that he had committed war crimes against civilians in Skabrnja.