IRGC Boats Close in on Vessels Escorting US Guided Missile Submarine By Irans Natanz Nuclear Facility Attacked Again US Navy's Coast Guard vessels fired warning shots at Iran's Islamic Revolutionary Guard Corps Navy (IRGCN) boats in the Strait of Hormuz. The US ships fired the shots at the IRGC boats after they closed in on the US vessels that were escorting guided missile submarine USS Georgia. A Pentagon spokesman said the Iranian boats came in on the US ships at high speed and were just about 137 metres away from the US formation when the shots were fired. "Earlier today a large group of IRGCN fast boats conducted unsafe and unprofessional maneuvers and failed to exercise due regard for the safety of US forces as required under international law," Pentagon spokesman John Kirby said.