ran"s Navy once again harassed US ships operating in the Arabian Gulf, this time coming within 68 yards of the ships on Monday night, prompting one of the American ships to fire warning shots, according to Cdr. Rebecca Rebarich, a spokeswoman for the US Navy"s Fifth Fleet. — Courtesy photo WASHINGTON — Iran"s Navy once again harassed US ships operating in the Arabian Gulf, this time coming within 68 yards of the ships on Monday night, prompting one of the American ships to fire warning shots, according to Cdr. Rebecca Rebarich, a spokeswoman for the US Navy"s Fifth Fleet. Three fast inshore attack craft from the Islamic Revolutionary Guard Corps (IRGC) Navy came within 68 yards of the USS Firebolt, a Navy patrol coast ship, and the Coast Guard cutter Baranoff, Rebarich said in a statement. The Iranian ships kept operating close to the US vessels despite repeated bridge-to-bridge warnings and the use of loud-hailer devices. In response, the Firebolt fired warning shots, Rebarich said, at which point the Iranian ships backed away to a safe distance. "Throughout the interaction, US forces proactively communicated with the IRGCN vessels and executed pre-planned responses to reduce the risk of miscalculation, avoid a collision, and to de-escalate the situation," Rebarich said. The incident marks the second time this month that ships from the IRGC Navy have harassed US ships in the Arabian Gulf. On April 2, four IRGC ships, including three fast attack craft and a support vessel, came within 70 yards of two Coast Guard cutters. "The Harth 55 closed aggressively on Wrangell"s bow, resulting in Wrangell maneuvering to avoid collision while sounding five short blasts from the ship"s horn," Rebarich said of the April 2 incident. In that encounter, the Iranian ships harassed the Coast Guard cutters for approximately three hours, Rebarich said, during which the US ships issued bridge-to-bridge warnings and sounded five short blasts from the ships" horns. The Harth 55 came within 70 yards, or less than a football field, of both ships. Rebarich said that the Iranian actions on April 2, "were deemed unsafe and unprofessional," increasing the risk of collision. In addition, the actions of the Iranian ships ignored internationally recognized maritime customs and international regulations for preventing collisions at sea. The Coast Guard ships are part of Patrol Forces Southwest Asia, the largest Coast Guard unit outside the United States. The Wrangell and the Monomoy are 110-foot Coast Guard cutters with shallow drafts, able to operate in the waters of the Arabian Gulf. News of Iran"s actions come as the country, US and other world powers continue talks over the Joint Comprehensive Plan of Action (JCPOA), the nuclear deal signed in 2015. US and Iranian officials said last week progress has been made in talks about rejoining the nuclear deal. It also follows leaked audio of Iranian Foreign Minister Javad Zarif criticizing the IRGC and assassinated top general Qasem Soleimani. In the three-hour interview recorded as part of a research project by Iranian journalist and economist Saeed Laylaz, Zarif said that Soleimani was directing foreign policy and attempting to sabotage the JCPOA and that Iranian diplomacy had been undermined and overshadowed by the military"s actions, especially in Syria, where the IRGC aided President Bashar Al-Assad to crush a rebellion against his rule. — CNN