"As promised to our dear people, we will not spare any effort to increase the missile capabilities of the country and we will certainly increase our missile power every day," the minister, Brigadier General Amir Hatami, said.

He described the new version of the Fateh Mobin as "100-percent domestically made... agile, stealth, tactical (and) precision-guided".

"Be sure that the greater the pressures and psychological warfare against the great nation of Iran, our will to enhance our defence power in all fields will increase," he added.

Iran's missile programme is a major bone of contention with world powers, particularly the United States, but is seen as vital by Iran to its defensive posture in a troubled region.

President Donald Trump, who pulled out of the 2015 nuclear deal with Iran and world powers in May, has called for a new agreement that restricts Iran's missile capabilities and regional interventions.