India, March 13 -- Iran's military on Thursday claimed it possesses a large fleet of suicide drone boats that are being deployed to restrict maritime traffic through the strategically vital Strait of Hormuz.

Iranian state television released footage that it said was filmed inside an underground weapons complex described by authorities as a "missile city".

The video showed long tunnels lined with naval drones, anti-ship missiles and sea mines.

One still image from the material showed a naval drone mounted on a trailer inside a tunnel beneath a portrait of Iran's late Supreme Leader Ali Khamenei.

The naval drones, also known as unmanned surface vehicles (USVs), have already been used in attacks on oil tankers in the Persian Gulf, accord...