"Glavas's defence attorney Ante Madunic has asked Investigating Judge Zdenko Posavec to suspend the proceedings," court spokesman Kresimir Devcic told Hina.
Devcic said he expected the investigating judge would decide on the defence motion at the beginning of next week.
Under the Law on Criminal Procedure, an investigation may be suspended if the accused is not fit to participate in the proceedings for health reasons.
The court spokesman confirmed that Glavas's health had deteriorated and that the doctors in the prison hospital would not let him attend a witness hearing scheduled for today.
"The detainee's condition became worse, he threw up twice and complained of a headache and muscle pain, but he is conscious and keeps insisting on attending investigative hearings," Devcic said.
Judge Posavec continued the investigation this morning hearing six witnesses.
The court spokesman explained that failure by the suspect and his defence counsel to appear in court was not an obstacle to the continuation of the investigative proceedings.
Meanwhile, Health Minister Neven Ljubicic rejected an interpretation that doctors should not help Glavas if he refused medical treatment in writing.
Ljubicic told reporters in the Parliament building that such a view was against the Health Insurance Act and the Patient Rights Protection Act.
"If a patient cannot make rational decisions on his own, a doctor must help him and use all means of modern medicine available to him to save his life," Ljubicic said, noting that this was also the position of the National Bioethics Commission.
"Statements signed by a patient can have no legal validity, and if a doctor was to act according to them it would open the path to passive euthanasia, which is not accepted by the EU and a majority of the countries in the world," he said.