By Idrees Ali and Phil Stewart, Reuters
US Defense Secretary Pete Hegseth.
Photo: AFP / Octavio Jones
The US naval blockade of Iran is just an example of "polite" behaviour during the ongoing ceasefire and US forces are ready to strike Iran's power plants and energy industry if ordered, US Defence Secretary Pete Hegseth said on Thursday (all times local).
Standing alongside two of the US military's most senior officers, Hegseth said Iran needs to choose wisely as it prepares for negotiations with the United States.
"We are reloading with more power than ever before, and better intelligence," Hegseth said at a Pentagon news briefing. "We are locked and loaded on your critical dual-use infrastructure, on your remaining power generation, and on your energy industry. We'd rather not have to do it."
President Donald Trump's administration expressed optimism on Wednesday about reaching a deal to end the Iran war, while also warning of increasing economic pressure against Iran if it remains defiant.
That has included a blockade of Iran that went into effect on Monday, with the US military forcing 14 ships to turn around. Dozens of US warships and aircraft, including about 10,000 military personnel, are enforcing the blockade.
Trump is hoping the effort will force Iran to accept US terms for ending the war, which was launched by the US and Israel on 28 February, including opening up the Strait of Hormuz, a waterway through which roughly one fifth of global oil and gas exports ordinarily transits. Trump has said that was also a condition of the ceasefire due to expire next week.
The war has resulted in the largest-ever disruption of global oil and gas supplies.
Analysts have said that Iran can withstand a complete halt in oil exports of up to two months before being forced to curb production.
Hegseth, in comments aimed at the Iranian leadership, said that the blockade "is the polite way that this can go."
US President Donald Trump mimics firing a gun as he speaks about the conflict in Iran at the White House on 6 April, 2026.
Photo: AFP / Kent Nishimura
Ready to resume operations
Admiral Brad Cooper, the head of US Central Command, which oversees military operations in the Middle East, said the military was adjusting tactics, techniques and procedures, but he did not provide any details.
During the same briefing, General Dan Caine, chairman of the US military's Joint Chiefs of Staff, added that American forces are "ready to resume major combat operations at literally a moment's notice."
US Navy ships would pursue any Iranian-flagged vessel or any vessel attempting to provide material support to Iran, Caine told the briefing. He added that could take place not just in the region, but also the Indo-Pacific.
Ships trying to break the blockade would be intercepted and warned that "if you do not comply with this blockade, we will use force," and enforcement would occur inside Iran's territorial seas and in international waters, Caine said.
No ships have been boarded so far, Caine said.
The US military has widened its blockade to include cargoes deemed contraband, and any vessels suspected of trying to reach Iranian territory will be "subject to belligerent right to visit and search," the US Navy said in an advisory on Thursday.
"These vessels, regardless of location, are subject to visit, board, search, and seizure," the Navy said in an updated advisory.
Contraband items listed included weapons, weapons systems, ammunition, nuclear materials, crude and refined oil products as well as iron, steel and aluminum.
Sources briefed by Tehran have told Reuters that Iran could let ships sail freely through the Omani side of the Strait of Hormuz without risk of attack under proposals it has offered in talks with the US, providing a deal is clinched to prevent renewed conflict.
- Reuters