LONDON (Reuters) - Iran has no plans currently to extend the range of its missiles since their 2,000-km (1,240-mile) reach is enough to protect the country, the Revolutionary Guards commander said on Tuesday, amid mounting U.S. pressure over Tehran's missile program.

"We have the scientific ability to increase our missile range but it is not our current policy since most of the enemies' strategic targets are already within this 2,000-km range. This range is enough to protect the Islamic Republic...," Major General Mohammad Ali Jafari was quoted as saying by Tasnim news agency.

President Donald Trump withdrew the United States last month from the 2015 accord between Iran and world powers that curbed Tehran's nuclear activity in exchange for sanctions relief.

He said the deal was deeply flawed as it had not curbed Iran's ballistic missile program or reined in its support for proxies in conflicts in Syria, Iraq and Yemen, and said Washington would reimpose tough sanctions on Tehran.

The Islamic Republic has repeatedly said its ballistic missiles are solely defensive and they, along with its support for allies elsewhere in the Middle East, are not negotiable.

Jafari said on Tuesday previous negotiations with the United States about Iran's nuclear program were "an exception", and called Iranian politicians and activists who have favored fresh talks with Trump as "traitors and anti-revolutionaries".

On Saturday, over 100 activists associated with the moderate and reformist camps in Iranian politics welcomed Trump's deal with North Korean leader Kim Jong Un envisaging a complete denuclearization of the Korean peninsula.

Iran A display featuring missiles and a portrait of Iran's Supreme Leader Ayatollah Ali Khamenei is seen at Baharestan Square in Tehran, Iran, Sept. 27, 2017. Photo: Nazanin Tabatabaee Yazdi/TIMA via REUTERS

In a statement published by Iranian media, the activists urged Tehran to start direct negotiations with Washington "with no preconditions" to resolve decades of enmity between the two countries dating to Iran's 1979 Islamic Revolution.

Jafari rejected their call. "The North Korean leader was a revolutionary but a communist, not an Islamic one. That is why he surrendered, but we will not do the same," he was quoted by the semi-official Fars news agency as saying.

Jafari said previously that the range of Iran's ballistic missiles was based on limits set by Supreme Leader Ayatollah Ali Khamenei, who commands the armed forces.

Iran has one of the Middle East’s largest missile programs and some of its precision-guided missiles have the range to strike arch-adversary Israel, which is widely believed to be the only country in the Middle East with nuclear weapons.