Iran's President Mahmoud Ahmadinejad gestures during a visit to the 'Cuba Libre' neighborhood in Managua, Sunday, Jan. 14, 2007. [AP]

"For all those who've been trying to create this narrative about invading Iran, which is silly, what we've really said is that we're going to use diplomatic means to try to get the government in Iran to change its behavior," White House spokesman Tony Snow said.

Snow said Iran fails to abide by UN Security Council resolutions and a new draft resolution is being presented to the UN Security Council to bring more pressure on the Iranian side.

Britain, China, France, Russia, the United States and Germany agreed Thursday on a draft resolution imposing tougher sanctions on Iran for its defiance over its nuclear program. A vote is expected next week.

The United States has accused Iran of trying to develop nuclear weapons under the cover of a civilian nuclear program. Iran has denied the charges.