Hearings in Slobodan Milosevic's war crimes trial have been postponed at least until Wednesday because the former president is ill, the U.N. tribunal said Monday.

A court official said Milosevic had a slight fever.

It was the second delay due to illness since the start of his trial on Feb. 12. In March, hearings were canceled for two weeks after Milosevic came down with the flu.

Milosevic is the highest-ranking person to go on trial since the establishment of the Yugoslav war crimes tribunal in 1993. He has been charged with every crime in the court's statute.

He faces 66 counts, including genocide, for atrocities allegedly committed during a decade of Balkan wars in the 1990s. The former president, who is defending himself in court, denies the charges.