Iran's hardline president lashed out anew at the United States and President Barack Obama on Saturday, accusing him of interference and suggesting that Washington's stance on Iran's postelection turmoil could imperil Obama's aim of improving relations.

"We are surprised at Mr. Obama," Mahmoud Ahmadinejad said in remarks to judiciary officials broadcast on state television. "Didn't he say that he was after change? Why did he interfere?"

"They keep saying that they want to hold talks with Iran ... but is this the correct way? Definitely, they have made a mistake," Ahmadinejad said.