Glavas's lawyer Ante Madunic told reporters that his client's health had slightly deteriorated and that he was allowed to leave the prison hospital only in the company of medical staff.
The doctor and the nurse waited in a hall while an investigating judge heard four prosecution witnesses as part of an investigation into war crimes committed against Serb civilians in the eastern city of Osijek in late 1991, in which Glavas is a suspect. There was no need for a medical intervention.
Glavas's defence team said that a panel of judges had not yet decided on their latest appeal against Glavas's custody being extended on account of the gravity of the crimes he is suspected of. They had previously announced that should their appeal be rejected they would file a complaint with the Constitutional Court.
Glavas is charged with personally ordering the maltreatment and murder of Cedomir Vuckovic and Djordje Petkovic and the torture of three other Serb civilians.
The co-suspect, Krunoslav Fehir, who also attended the hearing, had earlier admitted to the crimes, saying that they had been ordered by Glavas.
Before today's hearing, representatives of an Osijek-based association of war victims presented Glavas's lawyers with a petition signed by 35,000 people demanding that Glavas be released until it was decided whether he would be indicted or not.
The petition was also presented to Investigating Judge Zdenko Posavec and Parliament Speaker Vladimir Seks.
Seks told a delegation of the Osijek association at a meeting in the parliament building that Parliament and the court had made their decisions on Glavas, expressing hope that Glavas would be granted provisional release.
"I have expressed my understanding several times that Glavas should be granted provisional release. I have expressed my sympathy with his situation and hope that everything will be resolved in a just way," Seks said.
Petitioners said they were demanding equal justice for all, insisting that Glavas should be granted provisional release just like Serb war crimes indictees had been.
"We demand that Glavas be granted provisional release just like that Serb from Berak who killed 22 Croats. Don't let another genuine defender of Croatia die in the 21st century, don't have him on your conscience," they told Seks.
Meanwhile, the Zagreb County Court panel of judges rejected the defence appeal against the ruling by the investigating judge to keep Glavas in custody for another month.