In the latest episode to stir tensions in the Gulf, US President Donald Trump said at the White House that the drone had flown to within 1000 metres of the USS Boxer and ignored “multiple calls to stand down.”
“This is the latest of many provocative and hostile actions by Iran against vessels operating in international waters. The United States reserves the right to defend our personnel, facilities and interests,” Trump said.
“The drone was immediately destroyed,” he added.
Iranian Foreign Minister Mohammad Javad Zarif told reporters at the United Nations: “We have no information about losing a drone today.”
The Pentagon said in a statement that the USS Boxer, an amphibious assault ship, had taken “defensive action” against a drone on Thursday morning as the Boxer was moving into the Strait of Hormuz.
“We do assess it was an Iranian drone,” said Commander Rebecca Rebarich, a Pentagon spokeswoman.
Tensions in the Gulf region are high, with fears that the United States and Iran could stumble into war.
The United States has blamed Iran for a series of attacks since mid-May on shipping around the Strait of Hormuz, the world’s most important oil artery. Tehran rejects the allegations.
Iran in June shot down a US military surveillance drone in the Gulf with a surface-to-air missile. Iran says the drone was in its airspace, but Washington says it was in international skies.
Trump said at the time the United States had come close to launching a military strike on Iran in retaliation for the downing of the US drone.
The increased use of drones by Iran and its allies for surveillance and attacks across the Middle East is raising alarms in Washington.
Relations between the US and Iran have worsened since last year when Trump abandoned a 2015 deal between world powers and Iran in which Tehran agreed to restrict nuclear work in return for the lifting of sanctions.
The US has reimposed sanctions to throttle Iran’s oil trade and says it wants to increase pressure on Tehran to renegotiate the accord, discuss its ballistic missile program and modify its behaviour in the Middle East.
Iran’s clerical rulers have ruled out renegotiating the nuclear deal or holding talks on its missile program, which it says is purely defensive.
Earlier on Thursday, the US demanded Iran immediately release a vessel it seized in the Gulf.
Iran played down the seizure of the ship, which it said was a small vessel that was smuggling oil.
Iranian state TV aired footage of a vessel called “RIAH.” The Panamanian-flagged oil tanker MT Riah disappeared off trackers in Iranian territorial waters days ago.
Revolutionary Guards Commander-in-Chief Hossein Salami said on Thursday that Iran had adopted a defensive strategy, but warned that “if our enemies make any mistakes … our strategy can become an offensive one”.
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