Iran’s IRGC Navy issued a statement indicating that “in recent weeks, we have witnessed the recurrence of unprofessional behaviour of the U.S. Navy in the Persian Gulf threatening the security and stability of the region and posing new risks… Accordingly, IRGC has increased the capacity of its naval patrols in the waters of the Persian Gulf to prevent the continued illegal, unprofessional, dangerous and even adventurous behaviour of American terrorists, as well as to strengthen the security of domestic vessels and combat fuel smuggling”. The statement also rejected the U.S. account of a 15 April naval interaction between the two sides, asserting that the U.S. vessels had carried out “unprofessional and provocative actions”. It went to warn that “the IRGC navy and the powerful armed forces of the Islamic Republic of Iran will consider the dangerous behaviour of foreigners in the region as a threat to their national security, and give a definite response to any computational error”.