An Iranian news outlet says the elite Revolutionary Guard has inaugurated a surface-to-surface ballistic missile it claims has a 1,000-kilometre (620-mile) range.
He said the country declares possession of full defensive might on the eve of the 40th anniversary of the victory of its Islamic Revolution.
The surface-to-surface missile was unveiled by Guard Commander Major General Mohammad Ali Jafari and aerospace commander Brigadier General Amirali Hajizadeh.
The report said the missile, dubbed Dezful, is a version of the Zolfaghar missile that has a 700-kilometre (430-mile) range and a 450-kilogram (992-pound) warhead.
The facility's location was not specified and pictures published by Sepah News showed only the two commanders in a room examining the missile.
"We will have no bargaining and dealing with the enemy over the country's means of defense and over whatever provides or supports the national power", Ayatollah Khamenei said in October 2017.
"Europeans talk of limiting our defensive capability while they have the audacity (to allow) their offensive power be used to attack innocent people all over the world", he added.
Leader of the Islamic Revolution Ayatollah Seyed Ali Khamenei has reiterated on various occasions that Iran's defense capabilities and power are not subject to negotiations.
The United States has vowed to remain "relentless" in pressuring Iran to deter its missile programme, after the Islamic Republic unveiled a new ballistic weapon days after testing a cruise missile.
Iran and the other signatories have stuck by the 2015 agreement, although some European governments have demanded an addition to address Tehran's ballistic missile program and its intervention in regional conflicts.
European powers remains committed to a 2015 nuclear deal with Iran, but are under pressure from Washington to cut economic and political ties following the Trump administration's decision to pull out of the nuclear deal and reimpose sanctions despite Tehran's compliance.
It is also within the 2,000km range that Iran has voluntarily set for itself, although it is sufficient to reach Israel and Western military bases in the Middle East.
Those comments included France's calling on Iran last month to "immediately cease all ballistic missile-related activities created to carry nuclear weapons, including tests using ballistic missile technology".
President Donald Trump pulled the U.S. out of the nuclear accord in May and reimposed sanctions on Iran, citing the missile programme among its reasons for withdrawing.