Iran isolated in its nuclear stance: US

"Their aggressive military programme and defiant rhetoric are further examples of how the regime is isolating itself and the Iranian people from the rest of the world," spokesman Scott McClellan said at a press briefing.

"It is also a reminder of why the international community is united in its concern about the regime's possible development of nuclear weapons and why the international community is calling on Iran to comply with its international obligations or face further isolation."

Tehran's military activities have aroused international concern. McClellan said the world community speaks with one voice in urging Iran to abandon its nuclear programme -- reflected, he said, in last week's unanimous statement from the UN Security Council giving Iran 30 days to abandon the sensitive nuclear work, but without issuing a threat of sanctions.

"Last week the Security Council sent a very clear statement to the regime, and said, 'Comply with your obligations, come clean'," McClellan said.

"You have 30 days to come clean, make a commitment to come clean and comply with your obligations, or we're going to back at the Security Council consulting about next steps to take."

The spokesman called on Tehran "to suspend its uranium enrichment and enrichment-related activity and come back to the negotiations and act in good faith."