A US Coast Guard ship fired approximately 30 warning shots as a “large group” of Iranian Islamic Revolutionary Guard Corps Navy fast boats conducted “unsafe and unprofessional maneuvers” near US naval vessels in the Strait of Hormuz on Monday, Pentagon spokesman John Kirby said.A US Coast Guard ship fired approximately 30 warning shots as a “large group” of Iranian Islamic Revolutionary Guard Corps Navy fast boats conducted “unsafe and unprofessional maneuvers” near US naval vessels in the Strait of Hormuz on Monday, Pentagon spokesman John Kirby said.