The incident followed a confrontation in January, when the United States said Iranian boats aggressively approached three U.S. Naval ships and warned that they would explode. Iran said that was a routine contact.
“The USS Typhoon, a patrol craft, was approached by three high speed boats of unknown origin,” a spokeswoman for the Bahrain-based Fifth Fleet told Reuters on Friday.
She said the U.S. vessel, which was sailing from the central to the northern part of the Gulf, tried to communicate with the boats by routine methods but decided to fire the flare after receiving no response.
“The small boats then stopped and fell out of the visibility range and nothing further happened,” she said, adding that the boats bore no flag or markings identifying their origins or purpose.
The Gulf is vital to world oil shipments, with around 17 million barrels per day of crude oil, over a third of total global shipments, passing through the waterway.
A U.S. Defense Department official in Washington said Thursday’s incident was not viewed as serious.
“They (U.S. Navy officials) did not view it as a serious or credible threat,” the official said.
Tensions between Washington and Tehran are already high over Iran’s nuclear program. Iran says its nuclear program is aimed at electricity generation but the United States suspects it wants to develop atomic bombs.
(Reporting by Lin Noueihed; Editing by Giles Elgood)
