U.S. Defense Secretary Pete Hegseth told reporters the U.S. military has the capability to maintain a naval presence in the region to enforce its retaliatory blockade of Iran, which has inflicted severe economic damage on the country.
"Indefinitely the United States Navy can maintain a blockade like that because we'll rotate ships in and out, as we have, and we'll continue to," Hegseth told reporters during a trip to Panama.
Treasury Secretary Scott Bessent said the United States planned to inflict more financial damage on Iran.
"Watch this space for more announcements coming next week because we are going to apply measures like have never been seen in the history of economic isolation on a country," he said in an interview on Newsmax's "Rob Schmitt Tonight" programme.
U.S. President Donald Trump is under pressure at home to end an unpopular war, with high fuel prices dragging down his approval ratings and potentially eroding his party's control of Congress in midterm elections in November.
Trump has repeatedly asserted that the U.S. has "total control" over the strait, through which a fifth of global oil and liquefied natural gas flowed before the start of the war, prompting Iranian denials.
Tehran has said it will not allow the waterway to reopen until its conditions are met. These include removing economic sanctions and releasing frozen Iranian assets.
On Thursday an Iranian parliamentary committee approved Iran's plan for the strait. It includes a provision banning the transit of U.S.-, Israeli- and other "hostile" countries' assets and equipment, the semi-official Tasnim news agency reported.
The U.S. lifted its blockade of Iran's shipping and ports for a month in mid-June but has since reimposed it, cutting off Tehran's primary source of hard currency and compounding earlier losses from wartime strikes on its energy infrastructure.
Washington previously said it would lift the Iranian blockade once Iran and Oman, which sit on either side of the strait, reach an agreement to restore commercial shipping.