The United States has transferred 22 crew members from the Iranian container ship, the Touska, to Pakistan, in what Islamabad describes as a “confidence-building measure” during tension in the Strait of Hormuz.

US Central Command (CENTCOM) spokesman, Captain Tim Hawkins, said the crew had been handed over for repatriation. Pakistan’s foreign ministry confirmed the transfer, saying the sailors would be returned to Iranian authorities.

The Touska was seized by US forces in the Gulf of Oman in the early hours of April 20, in what Tehran described as an act of “piracy”, after the US declared a naval blockade of Iranian ports. Iran had effectively closed the Strait of Hormuz following the start of the US-Israeli war on Iran.

On Monday, tensions continued to escalate in and around the Strait of Hormuz.

First, US President Donald Trump announced that US naval ships would help guide stranded vessels through the strait in an operation he dubbed “Project Freedom”.

Iran issued a new map of the strait with new boundaries further to the east, and warned shipping not to attempt to pass without coordinating with the Islamic Revolutionary Guard Corps (IRGC).

Then, state media reported that two Iranian missiles struck a US naval vessel near Jask Island in the strait after ignoring warnings from the IRGC to turn back. Washington denied any attack.

Amid continued interceptions and seizures of vessels by both sides, questions remain over whether the two countries can de-escalate and reach a broader peace agreement. Pakistan has been central to these efforts, seeking to keep diplomatic channels open, but talks hosted in Islamabad last month ended without a breakthrough.

Iran’s foreign ministry says it is reviewing Washington’s response to its 14-point proposal aimed at ending the conflict sent via Pakistan on Friday. As Pakistan continues to mediate, Trump previously described Tehran’s offer as “unacceptable”.

What happened to the Touska?

The Iran-flagged Touska was seized by US forces in the Gulf of Oman, close to the Strait of Hormuz, on April 20 after Washington accused the crew of failing to comply with the US naval blockade on Iranian ports. Shortly after midnight local time in Iran, CENTCOM said the USS Spruance fired its 5-inch (127mm) deck gun at the vessel’s engine room, disabling it.

According to the US military, the ship was attempting to transit the Strait of Hormuz en route to Iran’s main commercial port, Bandar Abbas.

The Touska, a small container ship operated by the sanctioned Islamic Republic of Iran Shipping Lines (IRISL), was boarded near Iran’s Chabahar port. US Marines from the 31st Marine Expeditionary Unit captured the vessel after what CENTCOM said were repeated warnings over six hours.

Video released by the US military showed Marines descending from helicopters launched from the USS Tripoli and securing the Tusk.

Iran condemned the capture as a violation of international law and an act of “piracy“, before demanding the immediate release of the vessel and its crew.

What does the release of the Touska’s crew mean, diplomatically?

Pakistan has positioned itself as a mediator between Washington and Tehran, and is now framing the transfer of the Touska crew as a step towards de-escalation of tensions. In a statement, the Pakistani foreign ministry said the move reflected a “confidence-building measure” and reaffirmed its commitment to facilitating dialogue.

US and Iranian delegations met in Islamabad last month for their first talks since 1979. Although negotiations ended without a deal, they marked a rare moment of direct engagement.

Pakistan has since coordinated with regional powers, including Saudi Arabia, Turkiye, Qatar and Egypt, while maintaining close communications with China, in an effort to build broader support for de-escalation.

In a call with Iran’s Foreign Minister, Seyed Abbas Araghchi, on Monday, Pakistan’s Deputy Prime Minister, Ishaq Dar, reiterated that diplomacy remains the only viable path to stability. Tehran, in turn, acknowledged Islamabad’s mediation efforts.

Will this de-escalate tensions in the Strait of Hormuz?

There are not many signs that it will.

Indeed, tensions in the Strait of Hormuz have continued to increase despite the release of the crew members.

Most notably, Iran’s Revolutionary Guard published a new map on Monday outlining what it claims is an expanded zone of control in the waterway, stretching from Iranian and Omani territory to include the territorial waters of the United Arab Emirates as well.

Analysts say this new claim exceeds internationally recognised boundaries. The UAE has accused Iran of launching drones at an oil tanker linked to Abu Dhabi’s national energy company, while Washington has dismissed Iranian reports of an attack on a US warship as false.

Military analyst Alexandru Hudisteanu, a maritime security expert who served 13 years in the Romanian navy, told Al Jazeera on Monday that the conflicting claims reflect a broader test of resolve. “Any attempt to open the strait will likely be met with resistance from Iran,” he said, adding that Tehran views control of Hormuz as its primary leverage in negotiations.

Hudisteanu warned that the situation carries a high risk of miscalculation, with both sides continuing to operate in close proximity. For Iran, the Strait of Hormuz is the “only leverage” it has for peace negotiations, Hudisteanu said.

Iranian analyst Foad Izadi argued that the ceasefire effectively collapsed when the US imposed its blockade, which he described as “an act of war”. He added that the targeting and seizure of ships along the Strait of Hormuz further undermined any notion of a truce.

“Attacking an Iranian ship’s engine is an act of war as well,” he added, despite the release of the Touska’s crew signalling some short-term goodwill between the US and Iran.