Iran announced on Monday that it successfully test-fired the longest-range missiles in its arsenal.
The tests come just days after the Islamic republic revealed it had a second secret nuclear facility.
Iran's Revolutionary Guard successfully tested the medium-range missiles, which are capable of carrying a warhead and striking Israel, U.S. military bases in the Middle Wast, and parts of Europe.
It was the third round of missile tests in two days of drills by the powerful military force.
The tests come at a time when Iran is under intense international pressure to fully disclose its nuclear activities.
They began just two days after the U.S. and its allies disclosed that Iran had been secretly developing another underground uranium enrichment facility.
"The Islamic Republic of Iran has been building a covert uranium enrichment facility near Qom for several years," President Obama said at a newsconference on Friday at the G-20 Summit in Pittsburg, Pa.
Western nations are warning the regime it must open the site to international inspection or face harsher international sanctions.
Iran is believed to be a few years away from a nuclear weapon and even further away from developing a long-range missile that could strike the United States.
Iranian president Ahmadinejad has denied the project has anything to do with nuclear weapons.
"This is part of a pattern of deception and lies on the part of the Iranians from the very beginning with respect to their nuclear program," said Defense Secretary Robert Gates.
This Thursday in Geneva, the U.S. will hold its first direct diplomatic meeting with Iran in thirty years.
Diplomatic experts believe new sanctions could be imposed by the United Nations, Europe and the United States by the end of the year.