The Pentagon says no ships “made it past” the United States military blockade in the Strait of Hormuz in its first 24 hours and six merchant ships followed orders to turn around.
The statement on Tuesday from the US military’s Central Command (CENTCOM) was the first update since US President Donald Trump announced the blockade of the waterway after US-Iran talks over the weekend in Pakistan failed to yield an agreement on ending the war the US and Israel launched on February 28.
CENTCOM said the blockade applies only to vessels “entering and exiting Iranian ports” and other vessels remain free to transit the waterway.
It added: “US forces are supporting freedom of navigation for vessels transiting the Strait of Hormuz to and from non-Iranian ports.”
The Reuters news agency reported at least three vessels transited the strait during the first 24 hours of the blockade, citing shipping data. They included two tankers sanctioned by the US. The three ships were not heading to Iranian ports, according to Reuters.
However, the AFP news agency and several US media outlets, citing data from the maritime tracker Kpler, reported two ships had transited the waterway after leaving Iranian ports on Monday.
CENTCOM said 10,000 US sailors, Marines and airmen were involved in the operation, along with more than a dozen US warships and dozens of aircraft.
Military observers have widely said US forces have the capability to maintain the blockade for the foreseeable future but the continued pressure increases the likelihood of Iranian attacks. That in turn could see a two-week ceasefire that began on Wednesday collapse.
Meanwhile, any efforts to intercept vessels from strategic foes, including China, could create new escalations. The strategy is also likely to continue to roil global oil markets.
Iran has decried the US approach as “piracy” while Trump on Monday promised to “eliminate” any Iranian ships that seek to break the blockade.
Trump says more talks are possible
The update on Tuesday came as both sides signalled they would be open to further talks after failing to reach a breakthrough during 21 hours of negotiations between a US delegation led by Vice President JD Vance and an Iranian delegation led by parliamentary Speaker Mohammad Bagher Ghalibaf.
The talks were the highest-level face-to-face contact between the two countries since the 1979 Islamic revolution.
Key unresolved sticking points include control of the Strait of Hormuz, the future of Iran’s nuclear programme and whether the ceasefire extended to Israel’s ongoing invasion and bombardment of Lebanon.
In an interview with the New York Post newspaper on Tuesday, Trump said “something could be happening over the next two days” in Islamabad as he hailed Pakistani Field Marshal Asim Munir, who has been among the officials shepherding the negotiations.
Reporting from Tehran, Al Jazeera’s Ali Hashem said sources stated there are already messages being exchanged regarding what both sides consider to be “bridgeable issues”.
“Iran is open to talks, and it showed that from last week when it went to Islamabad. The main hurdle always is the mistrust, distrust between both sides,” Hashem said.
“For the Iranians, they’ve been repeating that they’re open. If the Americans want to fight, they’re going to fight. And if they want to talk, they can talk.”
DW Russian 
