The military activities "are further examples of how the regime is isolating itself and the Iranian people from the rest of the world," spokesman Scott McClellan told a press briefing.

McClellan warned that Iran would face further isolation from the international community unless it abandoned its nuclear program and complied with its international obligations.

Adam Ereli, deputy spokesman for U.S. State department, told media earlier this month that the United States was deeply concerned over Iran's announcement that it had test-fired a new land-to-sea missile and a highly destructive torpedo during its military exercises, saying it posed grave threats to regional security.

Thousands of Iranian troops, including the Revolutionary Guards Corps navy and air force, Iran's regular army and navy, the volunteer Basij militia and the Iranian police, are conducting joint military drills, which started last Friday and are scheduled to run through Thursday.

Tehran announced the successful testing of the new weapons on Tuesday, saying they would help the country to counter any possible extra-regional invasion.