Marshall Islands-flagged oil tanker Advantage Sweet, which, according to Refinitiv ship tracking data, is a Suezmax crude tanker which had been chartered by oil major Chevron and had last docked in Kuwait, sails through Bophorus Istanbul, Turkey, February 11, 2023. Image Credit: REUTERS

TEHRAN: Iran’s army said two Iranian crew members were missing and several others injured after a collision on Thursday in the Arabian Gulf involving an oil tanker which was later seized by its forces.

Following the collision of an unknown ship with an Iranian vessel in the waters of the Gulf two of the vessel’s crew went missing and several others were injured, the army said in a statement.

Earlier, Iran’s navy seized a Marshall Islands-flagged oil tanker in the Gulf of Oman amid wider tensions over Tehran’s nuclear programme, the latest-such capture in a waterway crucial for global energy supplies.

The Navy’s Mideast-based 5th Fleet identified the vessel as the Advantage Sweet. Satellite tracking data for the vessel from MarineTraffic.com showed it in the Gulf of Oman just north of Oman’s capital, Muscat, on Thursday afternoon. It had just come from Kuwait and listed its destination as Houston, Texas.

The Advantage Sweet issued a distress call at 1:15 p.m. while in international waters as Iran seized the vessel, the Navy said.

“Iran’s actions are contrary to international law and disruptive to regional security and stability,” the 5th Fleet said in a statement. “Iran should immediately release the oil tanker.”

The Navy initially said Iran’s paramilitary Revolutionary Guard seized the vessel, but an American naval aircraft later confirmed that Iran’s navy captured the ship, 5th Fleet spokesman Cmdr. Timothy Hawkins told The Associated Press.

Iran’s state-run IRNA news agency said the seizure came after an “unknown ship collided with an Iranian vessel last night in the Gulf, causing several Iranian crew members to go missing and get injured.”

It did not identify the other ship involved in the alleged collision.

The Advantage Sweet had been in the Gulf on Wednesday, but its track showed no usual behaviour as it transited through the Strait of Hormuz, through which a fifth of all oil traded passes.

Iran has made allegations in other seizures that later fell apart as it became clear Tehran was trying to leverage the capture as a chip to negotiate with foreign nations.

'Continued harassment of vessels'

The 5th Fleet said the Iranian seizure was at least the fifth commercial vessel taken by Tehran in the last two years.

“Iran’s continued harassment of vessels and interference with navigational rights in regional waters are a threat to maritime security and the global economy,” it added.

The vessel’s manager, a Turkish firm, did not respond to requests for comment. Its listed owner appeared to be a Chinese company.

Thursday’s seizure by Iran was the latest in a string of hijackings and explosions to roil the region.

The incidents began after then-President Donald Trump unilaterally withdrew the United States from Iran’s nuclear deal with world powers, which saw Tehran drastically limit its enrichment of uranium in exchange for the lifting of economic sanctions.

Also, the US Navy has blamed Iran for a series of limpet mine attacks on vessels that damaged tankers in 2019, as well as for a fatal drone attack on an Israeli-linked oil tanker that killed two European crew members in 2021.

Tehran denies carrying out the attacks, but a wider shadow war between Iran and the West has played out in the region’s volatile waters. Iranian tanker seizures have been a part of it since 2019. The last major seizure came when Iran took two Greek tankers in May and held them until November.

Meanwhile, talks over Iran’s tattered nuclear deal have been stalled for a year. Since the deal’s collapse, Iran runs advanced centrifuges and has a rapidly growing stockpile of enriched uranium. The head of the International Atomic Energy Agency has warned Iran has enriched enough up to 60% purity — a short technical step from weapons-grade levels of 90 per cent. That would be sufficient for Iran to make several nuclear weapons if it chooses to do so.