A military operation titled “Project Freedom” has been launched by the US Navy to secure a safe passage of commercial vessels through the blocked Strait of Hormuz, a spokesperson for the United States military’s Central Command (CENTCOM) told Al Jazeera on Tuesday.

The Strait of Hormuz has been at the centre of the US-Israeli war on Iran that began on February 28, triggering disruptions that have pushed up commodity prices around the world.

Iran has effectively sealed off the strait by threatening to deploy mines, drones, missiles and fast-attack craft. The US has countered by blockading Iranian ports and mounting escorted transits for commercial vessels.

The US military spokesperson said that ship owners and insurance companies have responded positively to the operation, which has “just begun” and is aimed at ensuring commercial ships can pass through the strait safely to benefit global and regional economies.

Later on Tuesday, US Secretary of State Marco Rubio said at a news conference in Washington, DC, that 10 civilian sailors have died due to the ongoing conflict in the Strait of Hormuz, adding that the US Navy has destroyed seven Iranian fast boats in the waterway.

Rubio said the US will continue to clear a passageway through the strait to restore freedom of navigation.

Operation ‘defensive in nature’

US Defense Secretary Pete Hegseth said the operation has the goal of reopening the strait and allowing the passage of thousands of stranded commercial vessels.

“Project Freedom is defensive in nature, focused in scope, temporary in duration [and] with one mission: protecting innocent commercial shipping from Iranian aggression,” Hegseth said during a briefing on Tuesday at the Pentagon.

He said that as part of Project Freedom, US forces would not need to enter Iranian waters or airspace, adding that Iran can no longer be allowed to prevent international commerce.

“Iran … cannot be allowed to block innocent countries and their goods from an international waterway,” Hegseth said, and added that two US commercial vessels, along with the country’s warships, have already traversed the strait.

“They said they control the strait – they do not,” the secretary said.

Iran denied any crossings had taken place, though shipping company Maersk said the Alliance Fairfax, a US-flagged ship, exited the Gulf under a US military escort on Monday.

Several merchant ships in the Gulf reported explosions or fires on Monday, and the United Arab Emirates (UAE) claimed to have come under an Iranian attack, with an oil port targeted on Monday. On Tuesday, Iran’s army denied any attack on the UAE in recent days.

Iran did confirm firing warning shots at a US warship approaching the strait, forcing it to turn back.

Alexandru Hudisteanu, a military and diplomatic analyst, has told Al Jazeera that the US operation to force open the Strait of Hormuz considerably increased the risk of miscalculation from both sides, especially Iran.

He said that by pushing two ships through the strait yesterday, the US “trapped Iran in an escalation situation”.

After issuing a new map of the Strait of Hormuz with an expanded Iranian area of control, Iran’s Islamic Revolutionary Guard Corps (IRGC) warned vessels on Tuesday to stick to the corridors it had set or face a “decisive response”.

US President Donald Trump said Iran’s military had been reduced to firing “peashooters” and Tehran wanted peace, despite public sabre-rattling.

“They play games, but let me just tell you, they want to make a deal,” the US president told reporters in the Oval Office.

On Tuesday, Air Force General Dan Caine, chairman of the US Joint Chiefs of Staff, said that there are more than 1,500 vessels with about 22,500 crew trapped inside the Gulf, but that Iranian attacks against US forces fell “below the threshold of restarting major combat operations at this point”.

Asked what Iran would need to do to violate the ceasefire, Trump said: “They know what not to do.”