A US Coast Guard ship fired 30 warning shots from a machine gun during an 'unsafe' encounter with Iranian fast-attack boats

Iranian Islamic Revolutionary Guard Corps Navy (IRGCN) vessels conducted unsafe and unprofessional actions against U.S. Military ships by crossing the ships’ bows and sterns at close range while operating in international waters of the North Arabian Gulf.
Iranian Islamic Revolutionary Guard Corps Navy vessels crossing the bows and sterns of a US ship at close range in international waters in the Persian Gulf. US Navy
  • A Coast Guard ship fired more than 30 warning shots during an "unsafe" encounter with Iranian boats.

  • Thirteen Iranian vessels closed rapidly with six US Navy warships escorting a submarine.

  • This is the second time in weeks that US ships have fired warning shots after Iranian actions.

  • See more stories on Insider's business page.

A US Coast Guard vessel fired about 30 warning shots on Monday to drive away Iranian fast-attack boats in an "unsafe" encounter in the Strait of Hormuz, the Pentagon said on Monday.

"A large group of Iranian Islamic Revolutionary Guard Corps Navy, also known as the IRGCN, fast boats conducted unsafe and unprofessional maneuvers and failed to exercise due regard for the safety of US forces," said John Kirby, the Pentagon's press secretary.

During the incident, 13 IRGCN fast-attack boats approached at high speed and closed to within 150 yards of a formation of six US Navy vessels escorting the guided-missile submarine USS Georgia. The US Navy said the IRGCN was "unnecessarily close" and "put the ships and their crews in immediate danger."

"Two of the 13 IRGCN vessels broke away from the larger group, transited to the opposite side of the US formation," the US Navy's Fifth Fleet said in a statement. The boats approached two US ships from behind "at a high rate of speed (in excess of 32 knots) with their weapons uncovered and manned."

After sounding the horn, reaching out over bridge-to-bridge radio transmissions, and trying other forms of communication, the Coast Guard cutter Maui fired a total of about 30 warning shots with a .50-caliber machine gun. The IRGCN vessels withdrew after the second round of warning shots.

The first round of warning shots was fired when the IRGCN vessels were 300 yards out. The second round of shots was fired at 150 yards.

Two Iranian Islamic Revolutionary Guard Corps Navy (IRGCN) fast in-shore attack craft (FIAC), a type of speedboat armed with machine guns, conducted unsafe and unprofessional maneuvers while operating in close proximity to U.S. naval vessels transiting the Strait of Hormuz, May 10
Two Iranian Islamic Revolutionary Guard Corps Navy fast in-shore attack craft, a type of speedboat armed with machine guns, conducted maneuvers while operating in close proximity to US naval vessels transiting the Strait of Hormuz on May 10. US Navy

Monday's incident marked the second time in less than a month that US forces have fired warning shots in response to actions taken by the IRGCN.

In late April, the US Navy coastal patrol ship USS Firebolt fired warning shots after three armed IRGCN fast-attack boats came "unnecessarily close" to it and the US Coast Guard patrol boat Baranoff as they operated in the Persian Gulf.

"Sadly," Kirby told reporters on Monday, "harassment by the IRGC Navy is not a new phenomenon." He said it is a threat that the commanding officers and crews of US ships, especially those operating in and around the Persian Gulf and the critical chokepoint that is the Strait of Hormuz, are trained to address.

"They have the right of self-defense," he said of US vessels, adding that "they have the means at their disposal to defend their ships and their crews." He then turned his attention to the actions of the IRGCN.

"As we said at the top, it's unsafe, it's unprofessional, and this kind of activity is the kind of activity that could lead to somebody getting hurt and could lead to a real miscalculation there in the region," Kirby said, emphasizing that such behavior is not in anyone's interests.

Asked at what point the US would take action to sink the Iranian vessels that harass US forces in the region, the Pentagon spokesperson said he would not comment on rules of engagement.

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