Former Bosnian Serb leader Radovan Karadzic, who is waiting for verdicts in his genocide trial at a United Nations war crimes tribunal, has had surgery to remove his gall bladder.

According to documents released Friday by the International Criminal Tribunal for the Former Yugoslavia, Karadzic had the surgery Aug. 27 at a Dutch hospital after tests showed inflammation of his gall bladder.

He returned to the medical unit of the court's detention center in The Hague the following day.

Karadzic stood trial for allegedly masterminding Serb atrocities throughout Bosnia's 1992-95 war that left some 100,000 people dead. He has always maintained his innocence.

His trial ended nearly a year ago and judges are still considering their verdicts. Prosecutors say Karadzic should be given a life sentence.