Iran said on Thursday it had seized a foreign tanker smuggling fuel in the Gulf, and the U.S. military commander in the region said the U.S. would work “aggressively” to ensure free passage of vessels through the vital waterway.
The U.S. blames Iran for a series of attacks on shipping in the world’s most important oil artery since mid-May.
It was unclear if the impounded ship was the same vessel Iran towed to safety on Sunday after sending a distress signal. Iranian state television had earlier said it was the same ship but the Revolutionary Guards statement did not confirm that.
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The Guards said the impounded ship was smuggling one million litres of fuel in the area of Larak Island in the Gulf and had 12 foreign crew.
Oil prices rose after news of the seizure amid rising tensions between Tehran and the West over the safety of shipping in the Strait of Hormuz, a vital gateway for energy exports.
Brent crude futures were up 54 cents at $64.20 a barrel by 1230 GMT after hitting a session high of $64.46.
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Reuters reported on Wednesday that shipping companies were hiring unarmed security guards for voyages through the Gulf as an extra safeguard.
Although Iran has yet to name the vessel, shipping industry sources said they believe it to be the MT Riah. Refinitiv data showed that the last signal received from the vessel was on Sunday when it was in the Strait of Hormuz off the Iranian island of Qeshm, heading towards Oman from Larak Island.
Washington said it was aware of the report but had no evidence “at this time to suggest Irans claims are true”.
U.S. Central Command chief General Kenneth McKenzie said the U.S. was talking to several countries about ensuring freedom of navigation in the Gulf.
The tanker’s registered manager is Prime Tankers in the UAE. That company told Reuters it had sold the tanker to another company, Mouj al-Bahar. An employee at Mouj al-Bahar said that the firm did not own it but had been managing the vessel up to two months ago, and that it was now under the management of a company called KRB Petrochem. Reuters could not reach KRB Petrochem for comment.
Iran, which has some of the world’s cheapest fuel prices due to heavy state subsidies and the fall of its currency, has been fighting rampant fuel smuggling by land to neighbouring countries and by sea to Gulf Arab states.
The Revolutionary Guards said in Thursday’s statement they had seized no other ship in the Gulf, as Western countries expressed concerns over alleged Iranian actions in the region.
Since mid-May, attacks on tankers near the Strait of Hormuz have unsettled crucial shipping lanes that link Middle Eastern oil producers to markets in Asia, Europe, North America and beyond.
Iran denies involvement but has threatened to respond robustly to U.S. sanctions that have followed President Donald Trump’s abandonment of a 2015 treaty in which Iran agreed to restrict nuclear work in return for the lifting of sanctions.