DUBAI, United Arab Emirates (AP) — The U.S. reimposed a naval blockade on Iran and intensified its airstrike campaign Wednesday in retaliation for Tehran’s attacks on ships trying to pass through the Strait of Hormuz. The American strikes hit an Iranian army barracks, killed at least seven troops and wounded hundreds of people across the country, Iranian officials said.

Days of back-and-forth strikes by the U.S. and Iran across the Middle East — and renewed threats to the waterway crucial to global energy supplies — have shredded the interim deal to end the conflict and the region could tip back into all-out war.

The U.S. first imposed a blockade in April and then lifted it last month after signing the interim deal that paused the fighting and set a 60-day period for negotiations over issues such as Iran’s nuclear program. Those talks have stalled as fighting over the Strait of Hormuz has intensified.

When the U.S. and Israel launched the war on Iran on Feb. 28, Tehran effectively closed the waterway to shipping traffic — a move that sent the price of oil, fertilizer and many other goods soaring far beyond the region and gave Iran major leverage in negotiations. Those rising prices pose a particular challenge to U.S. President Donald Trump and his Republican Party, which hopes to retain control of Congress in elections in November. But Washington has struggled to successfully reopen the waterway.

Iran’s parliament speaker and lead negotiator, Mohammad Bagher Qalibaf, said Iran was prepared for a fuller military confrontation if the U.S. does not live up to the terms of the interim deal, and Iran’s paramilitary Revolutionary Guard threatened to halt all energy exports from the Middle East over the blockade.

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“The export of oil and gas from the region will be either for everyone or for no one,” the Guard said.

Soon after the U.S. launched its third wave of strikes in 24 hours, Trump said Iran was ready to strike a peace deal, but he did not elaborate.

“They don’t like what we’re doing, and they do want to settle. We’ll find out whether or not we settle with them, or we just finish it off,” he said Wednesday at a defense summit at the U.S. Army War College in Pennsylvania.

Trump insisted that the U.S. is “doing really well with Iran” and added that the Islamic Republic “is not happy right now.”

Both the US and Iran launch attacks as the blockade is reimposed

The U.S. carried out a wave of strikes, hitting dozens of targets overnight, the military’s Central Command said Wednesday, and then resumed striking Iran during daylight — an unusual move that further signaled the increasing tempo of the attacks. Another wave of strikes began late Wednesday.

Within 17 hours of reimposing the blockade on Iranian ports, Central Command said U.S. forces had “redirected” two commercial vessels attempting to run the blockade.

“The U.S. military remains vigilant and prepared to ensure full compliance,” it said on social media.

Among the U.S. military’s targets was Greater Tunb Island, which is viewed as a strategic point in the Strait of Hormuz. Central Command said the attack targeted Iranian defense and missile sites.

Iran took control of three islands — Abu Musa, Greater Tunb and Lesser Tunb — from what would become the United Arab Emirates in 1971. The UAE has sought to reclaim them.

Some analysts have suggested that if the U.S. seized the islands, they could allow it to control the strait.

The U.S. military said its bombing campaign hit targets along Iran’s southern coast in Bandar Abbas, Khormuj, Ahvaz, Qeshm, Bushehr and Kuh-e Stak — a list that includes several coastal towns and another island near the strait.

Another strike targeted a barracks for Iran’s 388th Mechanized Infantry Brigade, which operates tanks and armored vehicles, in Sistan and Baluchestan province, Iranian state television reported. The report said the Americans fired at least 13 missiles in the attack and that the seven dead included conscripts and career soldiers. A number of troops were wounded.

More than 35 people have been killed and more than 300 wounded by U.S. airstrikes in recent days, said Hossein Kermanpour, a spokesperson for the Iranian Health Ministry. At least 72 people are hospitalized, he added.

Kermanpour did not break down the figures between civilians and combatants.

The announcement marked the first overall toll given by Iranian authorities for this round of fighting. The number of wounded was far larger than for any other recent violence between Iran and the U.S. The army said it would make “a decisive response,” according to state TV.

U.S. Navy Adm. Brad Cooper, who leads Central Command, said in a statement that Iran had launched dozens of missiles and drones at neighboring Gulf Arab countries.

Missile-alert warnings sounded Wednesday in Bahrain and Kuwait as they faced incoming Iranian fire — a daily occurrence in recent days. In a post on X late in the day, Bahrain’s Interior Ministry urged people to “head to the nearest safe place.”

Jordan said it shot down three incoming Iranian missiles. Iran claimed attacks on the three nations, all of which host U.S. forces.

In a statement published online, Qalibaf said the United States had not lived up to the terms of the interim peace deal, which he said included “Iranian arrangements” over the Strait of Hormuz.

“Now that we have entered the implementation phase, the United States, having exhausted its legal and diplomatic options, is trying to undermine those Iranian arrangements through force,” he wrote.

Qalibaf’s comments appeared aimed at critics within Iran who oppose negotiations with the U.S. He argued that negotiations should not be equated with compromise or surrender, but as part of a broader strategy of resistance.

The Strait of Hormuz remains at the heart of the fighting

The latest round of fighting is focused on the Strait of Hormuz, through which a fifth of the world’s oil and natural gas trade passes during peacetime. How to reopen the strait has bedeviled the U.S. since Iran choked it off in the early days of the war.

During the interim deal, some ships began moving through the passage using a route near Oman overseen by the U.S. military that is outside Tehran’s control.

In recent days, Iran attacked ships using that route — and back-and-forth attacks ensued. The U.S. has threatened to reopen the strait by force — but experts say that would require a much bigger armada if not tens of thousands of ground troops. Imposing the blockade is another way to put pressure on Iran.

But in the meantime, oil prices are rising. The price for Brent crude oil, the international standard, traded above $85 a barrel on Wednesday — more than 15% higher than the price before the war, but still well below the nearly $120 reached at the height of the conflict.

Analysts with the International Monetary Fund warned Wednesday that while a surplus of oil had kept prices low, “much of that room has now been used up.”

“Unless inventories are replenished, the world will start from a weaker position when the next shock comes,” Azim Sadikov and Jean-Marc Natal wrote in a blog post.

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Associated Press writers Konstantin Toropin, Will Weissert, Collin Binkley and Fatima Hussein in Washington, Christopher Weber in Los Angeles, and Nasser Karimi in Tehran, Iran, contributed to this report.