Iran reversed its decision to reopen the Strait of Hormuz and fired on a tanker attempting to pass the waterway on Saturday.
It also warned that it would continue to block transit through the strait as long as the U.S. blockade of Iranian ports remained in effect.
Confusion over the critical chokepoint threatened to deepen the energy crisis roiling the global economy and push the two countries toward renewed conflict, even as mediators expressed confidence a new deal was within reach.
Iran’s joint military command said on Saturday that “control of the Strait of Hormuz has returned to its previous state ... under strict management and control of the armed forces.”
Two gunboats from Iran’s Revolutionary Guard opened fire on a tanker transiting the Strait of Hormuz, the British military’s United Kingdom Maritime Trade Operations center said.
It reported the tanker and crew as safe, without identifying the vessel or its destination.
TankerTrackers.com reported vessels were forced to turn around in the strait, including an Indian-flagged super tanker, after they were fired on by Iran.
Saturday's developments came after U.S. President Donald Trump said the blockade “will remain in full force” until Tehran reaches a deal with the U.S. that includes its nuclear program. Tehran had reopened the strait Friday to commercial vessels.
Roughly one-fifth of the world’s oil passes through the strait and further limits would squeeze already constrained supply, driving prices higher once again.
Iran’s Friday announcement about the opening of the crucial body of water, through which 20% of the world’s oil is shipped, came as a 10-day truce between Israel and the Iranian-backed Hezbollah militant group in Lebanon appeared to hold.
Despite the escalation, Pakistani officials say the United States and Iran are still moving closer to a deal ahead of the April 22 ceasefire deadline.
The fighting has killed at least 3,000 people in Iran, nearly 2,300 in Lebanon, 23 in Israel and more than a dozen in Gulf Arab states. Thirteen U.S. service members have also been killed.
UN chief condemns attack in Lebanon that killed French peacekeeper
Stéphane Dujarric, the spokesman for U.N. Secretary-General António Guterres, says Guterres has strongly condemned the killing of a French peacekeeper and the wounding of three others in an attack in southern Lebanon.
The U.N. peacekeeping force in southern Lebanon came under attack with small arms fire Saturday morning. Two of the injured were hurt seriously, France’s president and the force known as UNIFIL said.
Both President Emmanuel Macron and the UNIFIL force blamed Hezbollah, but the Lebanese militant group denied involvement.
Iran declares the Strait of Hormuz fully closed, state media reports
The navy of Iran’s Revolutionary Guard Corps said it extended the closure to the corridor it had earlier designated for the safe passage of vessels through the strategic waterway and declared the strait fully closed until the U.S. blockade on Iranian ports and ships is lifted.
On Friday, Iran said vessels could move through the strait in coordination with it and against the payment of a toll.
But in a statement late Saturday carried by Iran’s state media, the navy warned that any violating vessel would be targeted.
Iran considers the U.S. blockade a violation of the ceasefire between the two countries. Two vessels were attacked earlier on Saturday in the Strait of Hormuz and off Oman’s coast, at least one of them by Iranian gunboats.
