By Steve Holland and Jarrett Renshaw
WASHINGTON, July 7 (Reuters) – The United States on Tuesday re-imposed sanctions on Iranian oil, as a U.S. official warned that Iran’s attacks on vessels in the Strait of Hormuz were “wholly unacceptable” and would be met with consequences.
Oil prices were up more than 5% following the announcement. The U.S. Treasury had authorized last month Iran oil sales until August 21 as part of the fragile agreement between Tehran and Washington. Tuesday’s revocation cuts that wind-down period to an end date of July 17.
The U.S. move came after three tankers reported being struck by unknown projectiles in and near the Strait of Hormuz in recent days, the British navy-affiliated agency UKMTO said in a report. There was no immediate comment from Tehran, or any claim of responsibility.
The U.S. official said negotiators continued to work in good faith toward a final agreement with Iran despite the latest escalation.
The attacks and the U.S. response threaten to put the diplomatic understanding between Washington and Tehran on shaky ground, raising the risk that further retaliation could derail negotiations over a broader agreement.
Another U.S. official, speaking on condition of anonymity, said initial indications were that Iran had fired at three commercial vessels.
The Strait of Hormuz, a narrow waterway between Iran and Oman, is one of the world’s most important energy choke points. Roughly a fifth of global oil and liquefied natural gas shipments passed through the strait each day before the war.
Any prolonged disruption could push up energy prices and increase pressure on consumers and governments already facing higher fuel costs.
Oil exports remain a critical source of revenue for Iran, providing billions of dollars in hard currency that help fund government spending and support an economy weakened by years of U.S. sanctions.
Despite restrictions, Tehran has managed to expand shipments in recent years, largely to China, making oil sales one of the country’s most important economic lifelines.
Oil prices have fallen steeply since the agreement was struck last month. Bob McNally, president of Rapidan Energy Group, said the developments “signal that the ceasefire is not as solid and durable as the oil market has chosen to assume,” and added that “the oil market has some risk pricing to do.”
(Reporting By Steve Holland and Jarrett Renshaw; additional reporting by Ismail Shakil, Timothy Gardner and Daphne Psaledakis; editing by Costas Pitas and Michelle Nichols)
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