Iran said Monday there is no room for negotiation with the United States over its nuclear program after it was reported by the UN's nuclear watchdog to the UN Security Council. "Our policy is the same toward the United States that it has so far been. There is no debate about relations and negotiation with the US There has been no change in our policy," said Gholamhossein Elham, spokesman of Iran's government, when he was asked if the country was ready to negotiate with Washington. Elham said the West made "a big mistake" by making the referral, because he contended the action indicated the West's opposition to Iran's development. Iran said Sunday that it had ended all voluntary cooperation with the UN nuclear watchdog agency, saying it would start uranium enrichment and bar surprise inspections of its facilities.