The United Nations' nuclear chief says Iran will allow inspectors to visit its newly revealed nuclear facility near Qom on October 25.
Mohamed ElBaradei announced the plan Sunday after meeting Iranian officials in Tehran.
During the talks, Tehran agreed to meet again with six world powers in Vienna on October 19. When the parties met in Geneva last Thursday, Iran said it would allow inspections at the Qom facility.
ElBaradei said Sunday the International Atomic Energy Agency has no concrete proof Tehran has an ongoing weapon program. But he said it is still investigating allegations Iran has studied nuclear weapons.
The U.S. ambassador to the United Nations, Susan Rice, said in Washington there are various assessments on Iran's nuclear capabilities, and they do not all align.
She said Sunday on NBC's "Meet the Press" if Iran does not give up its alleged nuclear weapons program, it will face increased sanctions.
Iran says its program is peaceful.