Iran continues to brazenly defy UN Security Council demands that it halt uranium enrichment, the chief US nuclear envoy warned before a new assessment that could lead to tougher sanctions against Teheran. Gregory L. Schulte said Tuesday that Washington "would welcome a report verifying that Iran has suspended its enrichment-related activities" when the International Atomic Energy Agency delivers its latest update by early next week. "Unfortunately, I don't foresee such a report," Schulte said in a speech at the University of Vienna, calling Iran "a blatant case of noncompliance" with the Nuclear Non-proliferation Treaty. "Iran continues to defy Security Council demands and shows no sign of planning to comply," he said. "Iran's leadership is actively and defiantly pursuing the technology, material and know-how to produce nuclear weapons."