UNITED NATIONS (AP) — The prosecutor of the U.N. war crimes tribunal for the former Yugoslavia is denouncing the inflammatory rhetoric by Serbia's far-right leader after his temporary release on health grounds last month and is urging judges to return him to detention.

Serge Brammertz told the U.N. Security Council on Wednesday that the intensity of the reaction to Vojislav Seselj's nationalist rhetoric and insults was a reminder that reconciliation in the Balkans "remains fragile."

He said it should encourage redoubled efforts to ensure accountability for serious crimes "and to firmly stand against all forms of revisionism."

Seselj had been in custody since 2003, charged as part of a criminal plot to drive out non-Serbs in Croatia and Bosnia during the conflict. Brammertz expressed frustration at the latest delay in deciding a verdict.