Former Bosnian Serb leader Radovan Karadzic refused to enter any pleas at the international war crimes tribunal in the Netherlands on Friday, forcing the judge to enter not guilty pleas in his name.

When asked how he would plead to the first charge, Karadzic responded: "I will not plead, in line with my standpoint as regards to this court."

His comment was in reference to his legal challenges to the court's jurisdiction in the case.

Tribunal Judge Iain Bonomy then asked whether Karadzic would have the same response to the remaining 10 charges. "Absolutely," Karadzic replied.

The judge then entered pleas of not guilty on Karadzic's behalf, as required by the court rules.

It was Karadzic's second appearance in The Hague-based courtroom of the International Criminal Tribunal for the former Yugoslavia since his arrest late last month after 13 years on the lam.

The 63-year-old faces 11 charges, including genocide and crimes against humanity, for allegedly masterminding the worst atrocities perpetrated by Serb forces in the 1992-95 Bosnian war, which claimed an estimated 100,000 lives.

'I have stopped using a false name': Karadzic

Early in the brief hearing, Karadzic demanded that the court tell him the status on several submissions he has made questioning whether the court should be able to prosecute him.

He asked whether the court was representing the international community or just NATO member countries.

"I have stopped using a false name, so I think that all the parties should do the same," said Karadzic.

Karadzic was practising alternative medicine and writing for a Serbian magazine under a false name when he was arrested in Serbia in July.

Bonomy stated that it was standard court procedure for a plea to be entered before the court considers such challenges.

Karadzic also reiterated his intention to represent himself, though he said he has assembled a team to help him.

That decision will see the former Bosnian Serb leader follow in the footsteps of his mentor, the late Yugoslavian president Slobodan Milosevic.

Milosevic's war crimes trial was drawn out over four years as he regularly launched into diatribes and posed rambling questions to witnesses, drawing frequent rebukes from the tribunal judges. On March 11, 2006, he died of a heart attack in his prison cell before a verdict was reached.

Karadzic's next court hearing has been scheduled for Sept. 17, when Karadzic plans to challenge the court's jurisdiction.