Iranian President Mahmoud Ahmadinejad has applied for a visa to visit the United States next week, the US says.
The application is apparently motivated by his wish to be at the nuclear Non-Proliferation Treaty (NPT) review conference next Monday.
US Secretary of State Hillary Clinton will be among more than 30 foreign ministers attending the opening day of discussions in New York.
The US says Iran is trying to build a nuclear weapon, but Tehran denies this.
