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- The U.S. launched strikes on Iran's coastal defense and missile sites on Wednesday.
- In response, Iran threatened to close energy export corridors for U.S. and allies' interests.
- President Donald Trump warned Iran of potential strikes on energy targets if talks fail.
WASHINGTON — The U.S. conducted a new wave of strikes against Iran's coastal defence systems and cruise missile storage and launch sites on Wednesday after reimposing a naval blockade of Iranian ports, while Iran threatened to shut off more regional energy exports.
The strikes mark the latest escalation of attacks and counterattacks launched by the two sides as they vie for control of the Strait of Hormuz, which carried about a fifth of global oil and gas shipments before the war.
"At (4 a.m. MDT) today, U.S. Central Command forces began launching a wave of strikes against Iran," the U.S. military said.
"The strikes are designed to further degrade military capabilities Iranian forces have used to attack commercial shipping in the Strait of Hormuz."
There were no immediate reports of attacks in Iranian media. U.S. Central Command said in a statement the military had targeted coastal defense systems and cruise missile storage and launch sites on Iran's Greater Tunb Island, and had completed the wave of strikes within around 90 minutes.
Late on Tuesday, the U.S. military said it had hit dozens of military targets near the Strait of Hormuz and Iranian coastal areas in strikes lasting seven hours.
In response, Iran's Islamic Revolutionary Guard Corps said on Wednesday it had struck U.S. military targets in the region, including in Bahrain, Kuwait and Jordan.
It also threatened on Wednesday to shut off more regional energy exports, saying the U.S. "must brace for the closure of all other export corridors that benefit the U.S. and its allies."
Hostilities have intensified since Iran said late on Saturday it had closed the Strait of Hormuz. The U.S. says Iran had attacked seven commercial ships over the last week, leaving nearly a dozen crew members killed, missing or injured.
'End of America's evils'
The war, which began with U.S. and Israeli strikes against Iran on Feb. 28, triggered Iranian attacks on Gulf states that host U.S. bases and caused major disruption to global energy supplies, raising fears of a surge in inflation.
Oil prices extended gains by about 1% on Wednesday, after settling on Tuesday on a new one-month high.
An interim ceasefire deal in the conflict signed last month was meant to lead to further negotiations including on Iran's nuclear program, and to a permanent truce, but a return to talks has faltered.
Analysts say that while the U.S. and Iran have gone back to sparring as they did before the interim ceasefire deal was signed, they are unlikely to return to full-scale war, though a risk of further escalation remains.
They say Iran is signaling it may use its Houthi allies in Yemen to shut Bab el-Mandeb, opening a new front against Washington and putting two of the world's most vital energy arteries at risk.
As a result of the war, Iran has been trying to assert permanent control over shipping in the Strait of Hormuz and to impose fees on vessels passing through it, in what would be a major shift of the balance of power in a region where the U.S. has long acted as guarantor of security.
The IRGC said on Wednesday that the Strait of Hormuz would remain closed until what it described as "the end of America's evils."
Shipping data showed an uptick in Iran-linked ships passing through the strait before a new U.S. blockade on Iranian ports took effect.
Bab el-Mandeb links the Red Sea to the Gulf of Aden, through which Saudi oil exports and a substantial share of global shipping pass.
Trump threatens to hit energy targets
President Donald Trump, who faces domestic pressure to avoid a full return to war, on Tuesday threatened to hit Iranian power plants and bridges next week unless Tehran resumes negotiations.
"I'll save the energy targets for last, but ultimately we'll hit energy targets," Trump said.
U.S. negotiators had been in touch with their Iranian counterparts to tell them "you better make a deal," Trump added.
As tensions escalated, Trump on Monday floated the idea of a 20% fee on shipping through the strait. On Tuesday, he scrapped the idea and said, without providing details, that he would instead seek investment deals with Gulf states.
The war has killed thousands of people and displaced millions, mainly in Iran and in Lebanon, where conflict was reignited between Israel and Iran-backed militant group Hezbollah.
Iranian government spokesperson Fatemeh Mohajerani said at least 30 civilians had been killed in recent days due to the U.S. strikes on southern Iran, state media reported on Wednesday.
Iran's army said at least seven active-duty and conscript personnel were killed in overnight U.S. strikes on the Bampur military base in the country's southeast.
