"This case has taken such a turn that (now) we believe they (the Westerners) regret to have spoken," Ahmadinejad said to journalists on his return to Iran from New York, where he attended the General Assembly of the United Nations.
"They can continue to use this case (against Iran) through the media but it was a blow to their arrogance," said the Iranian leader in reference to the United States and other Western powers.
Ahmadinejad also claimed that US President Barack Obama had "admitted the mistakes made by previous US administrations" in his UN speech.
Bibi wants US action
Meanwhile, Prime Minister Benjamin Netanyahu urged US officials to act against Iran in conversations with several senators and Congress members, including Nancy Pelosi, Speaker of the US House of Representatives.
The talks focused on recent developments in Iran's nuclear program and are believed to have also addressed the exposure of the new Iranian site in Qom. During the conversations, Netanyahu called for immediate American action on the Iranian front.
Earlier Saturday, Vice President Ali Akbar Salehi said Iran will allow the UN nuclear agency to inspect the newly revealed nuclear facility.
"Inspection will be within the framework of the regulations ... we have no problem with inspection (of the site). We will work out this issue with the agency and will announce the date of the inspection later after reaching an agreement with IAEA," he said.