An Iranian Navy warship takes part in the "National Persian Gulf day" in the Strait of Hormuz on April 30, 2019. (ATTA KENARE / AFP)

DUBAI/TEHRAN - Tehran has built underground "missile cities" along the Gulf coastline, the commander of Islamic Revolution Guards Corps (IRGC) Navy said on Sunday, warning of a "nightmare for Iran's enemies".

"Iran has established underground onshore and offshore missile cities all along the coasts of the Persian Gulf and the Gulf of Oman that would be a nightmare for Iran's enemies," Rear Admiral Ali Reza Tangsiri told the Sobh-e Sadeq weekly

"Iran has established underground onshore and offshore missile cities all along the coasts of the Persian Gulf and the Gulf of Oman that would be a nightmare for Iran's enemies," Rear Admiral Ali Reza Tangsiri told the Sobh-e Sadeq weekly.

"The IRGC Navy, like the IRGC Aerospace Force, has established underground and offshore coast-to-sea missile cities," Ali Reza Tangsiri was quoted by Tasnim news agency as saying.

ALSO READ: Iran says successfully tested new naval cruise missile

The "missile-launching floating cities" would be unveiled at the discretion of authorities, Tangsiri added.

Besides, the IRGC Navy has formed "naval Basij," or naval volunteer forces, along Iran's 2,200-km southern coasts, which comprise 428 flotillas and more than 23,000 servicemen, he said.

"If the US forces make any mistake, they will be followed as far as the Gulf of Mexico," the Iranian commander warned.

READ MORE: Iran's navy seeks new base for waters leading to Indian Ocean