Since Iran closed the pivotal Strait of Hormuz on April 18, hundreds of commercial tankers find themselves stranded, unable to move, with crews caught in limbo amid reports of gunfire and distressing incidents on board.

According to international law, the Strait of Hormuz is recognized as an international waterway, and ships are entitled to transit passage, as outlined by the United Nations Convention on the Law of the Sea (UNCLOS).

With approximately 20% of the world’s oil supply flowing through the Strait of Hormuz, this narrow passage holds immense significance for global energy markets, notes the U.S. Energy Information Administration.

The UK Maritime Trade Operations (UKMTO) reported that on the same day, Iranian gunboats fired upon a tanker, and a container vessel was hit by a projectile, resulting in cargo damage.

According to U.S. Central Command (CENTCOM), “U.S. Navy guided-missile destroyers are actively participating in a blockade mission, affecting Iranian ports.”

Audio released by maritime monitoring group TankerTrackers appears to capture the moment a vessel and its crew came under fire while approaching the strait, including a distress call from a crew member.

“Sepah Navy! Motor tanker Sanmar Herald! You gave me clearance to go… you are firing now. Let me turn back!” the crew member can be heard saying in the recording, according to TankerTrackers.

Iranian state media confirmed that shots were fired near vessels to force them to turn back, while the Ministry of External Affairs of the Government of India said the foreign secretary was deeply concerned.

Hapag-Lloyd, the world’s fifth-largest container shipping line, told Fox News Digital that it had activated a crisis team as its crews remain stuck on board vessels in the region.

“We have been working from Friday afternoon until today with the entire crisis team to bring the vessels out — in vain, unfortunately,” said Nils Haupt, senior director of group communications at Hapag-Lloyd AG.

“These events can easily lead to traumatic experiences. There is also a significant risk from sea mines, which has made insuring vessels for passage through the Strait nearly impossible.”

“The crews are well, but they are becoming increasingly impatient and frustrated. It is very unfortunate that we could not leave today,” he added. “Many ships are still stuck in the Persian Gulf.”

“Our six ships are anchored near the port of Dubai, and all crews hope for an improvement in the situation,” Haupt said.

The Islamic Revolutionary Guard Corps (IRGC) said on April 18 that the strait would remain closed until the U.S. lifts its blockade on Iranian ports, warning ships not to move from anchorage or risk being treated as “enemy” collaborators.

Iran has previously argued that restrictions on its oil exports and shipping amount to “economic warfare,” framing actions in the Strait of Hormuz as a response to foreign pressure on its economy, according to statements from Iranian officials and state media in past incidents.

“Approaching the Strait of Hormuz will be considered cooperation with the enemy, and any violating vessel will be targeted,” the IRGC said in a statement carried by the semi-official Tasnim News Agency.

Fishing boats dot the sea as cargo ships, in the background, sail through the Arabian Gulf toward the Strait of Hormuz off the United Arab Emirates, Friday, March 27, 2026. (AP Photo)

The United States imposed the blockade on Iranian ports to pressure Tehran to reopen the strait, with U.S. Central Command saying the measures are being enforced “impartially against all vessels.”

Hapag-Lloyd said its vessels have been stuck for weeks following the initial closure after the outbreak of war with Iran on Feb. 28.

“For us, it is critical that our vessels can pass through the strait soon,” Haupt said.

“We offer all crew members unlimited data so they can video call loved ones and access entertainment. Crews are strong, but after weeks on board there is growing monotony and frustration.”

“One crew experienced a fire on board from bomb fragments. Others have seen missiles or drones near their vessels,” he added.

“They are resilient, but each additional day makes the situation more difficult, more monotonous, and more stressful.”

President Donald Trump said Iran had agreed not to close the strait again but after the closure, Trump called the situation “blackmail” and said the U.S. would not back down.