The move marks the latest in a series of moves by President Donald Trump's administration against Iran in recent weeks.
The United States is deploying a carrier strike group and a bomber task force to the Middle East in a bid to intimidate Iran, U.S. national security adviser John Bolton said on Sunday.
Amid rising tensions between the United States and Iran, Bolton claimed the decision was "in response to a number of troubling and escalatory indications and warnings."
"The United States is not seeking war with the Iranian regime, but we are fully prepared to respond to any attack, whether by proxy, the Islamic Revolutionary Guard Corps or regular Iranian forces," Bolton said in a statement.
Washington has said it will stop waivers for countries buying Iranian oil, in an attempt to reduce Iran's oil exports to zero. It has also blacklisted Iran's elite Revolutionary Guard Corps.
The Trump administration's efforts to impose political and economic isolation on Tehran began last year when it unilaterally withdrew from the nuclear deal it and other world powers negotiated with Iran in 2015.
"The United States is deploying the USS Abraham Lincoln Carrier Strike Group and a bomber task force to the U.S. Central Command region to send a clear and unmistakable message to the Iranian regime that any attack on United States interests or on those of our allies will be met with unrelenting force," Bolton said.
Bolton, who has spearheaded an increasingly hawkish U.S. policy on Iran, did not provide any other details.
A U.S. official said the forces "have been ordered to the region as a deterrence to what has been seen as potential preparations by Iranian forces and its proxies that may indicate possible attacks on U.S. forces in the region."
The official, speaking on the condition of anonymity, said the United States was not expecting any imminent attack on U.S. forces.
As in Venezuela, the U.S. hopes to cripple Iran economically, in large part due to its role in places such as Syria and Palestine and opposing U.S. foreign policy.
Just as in Venezuela, sanctions have also damaged oil production, on which much of the economy is reliant, leading to price rises on basic goods and medicines. The country is hoping that the rising production of natural gas can help offset the effects of Trump’s sanctions.