BEIJING: China and the United States agreed that Iran faced "consequences" if it resisted greater openness on its nuclear programme, US President Barack Obama said Tuesday after talks with China's Hu Jintao.

Obama told reporters in a joint address to reporters that he and Hu "agreed that the Islamic Republic of Iran must provide assurances to the international community that its nuclear programme is peaceful and transparent."

"On this point our two nations and (other global powers) are unified.

"Iran has an opportunity to present and demonstrate its peaceful intentions but if it fails to take this opportunity, there will be consequences," Obama said.

China and the United States are among six world powers seeking a negotiated end to Iran's nuclear programmes. Related article: US, China leaders meet

The UN atomic watchdog on Monday demanded more information from Iran about the purpose of a previously secret nuclear site and indicated the Islamic republic could be hiding other facilities.