Don't Miss: Fresh flare-up at sea: Iran attacks three ships in Strait of Hormuz
The report comes even as US Central Command (CENTCOM) maintained that it had enforced a strict blockade. In a post on Tuesday, it said: "Since the start of the U.S. blockade against ships entering or exiting Iranian ports, US forces have directed 28 vessels to turn around or return to port."
The developments add to tensions in the strategic waterway, where Iran has also escalated enforcement. On Wednesday, the IRGC attacked three ships that were crossing Hormuz.
Tehran seized two cargo ships on Wednesday after attacking them and a third vessel, claiming the ships had failed to comply with its demands.
US President Donald Trump has continued to press the blockade as a tool of economic pressure, even as he extended a ceasefire with Iran.
Writing on Truth Social, he said: "Iran is collapsing financially! They want the Strait of Hormuz opened immediately- Starving for cash! Losing 500 Million Dollars a day. Military and Police complaining that they are not getting paid. SOS!!!"
In another post, he wrote: "Iran doesn't want the Strait of Hormuz closed, they want it open so they can make $500 Million Dollars a day (which is, therefore, what they are losing if it is closed!). They only say they want it closed because I have it totally BLOCKADED (CLOSED!), so they merely want to 'save face'."
"People approached me four days ago, saying, 'Sir, Iran wants to open up the Strait, immediately.' But if we do that, there can never be a Deal with Iran, unless we blow up the rest of their Country, their leaders included," Trump added.