The chief judge at The Hague says the trial of ex-Yugoslav President Slobodan Milosevic needs a ‘radical review’ because of the defendant's poor health.
Judge Patrick Robinson issued his warning after a doctor's report said Mr Milosevic needed to rest because of his extremely high blood pressure.
Earlier, the judges postponed the start of Mr Milosevic's defence case, saying they would issue a decision on how to proceed.
Mr Milosevic is accused of genocide and other offences related to the Balkan conflicts of the 1990s.
It had been expected that Milosevic, who was to conduct his own defence, would have 150 days to present his case.
Mr Milosevic had also been expected to call the British Prime Minister Tony Blair and the former US President Bill Clinton to answer questions about the NATO bombings of Serb forces during the Kosovo war.
