Tehran (Agencies): Iran is mass producing a ballistic missile which can travel at more than three times the speed of sound and hit targets on the high seas, a top commander said on Monday.

Commander Mohammad Ali Jafari, who heads the elite military force, the Revolutionary Guards, said the missile had a range of 300 kilometres.

He said the missile was "undetectable and can't be neutralised by enemies," without specifying the name. "It has very high precision in destroying targets," Jafari added.

"As the enemy's threats will likely come from the sea, air and by missiles, the Guards have been equipped with capabilities to neutralise the enemy's advanced technology," he said, according to another Iranian news agency, ISNA.

Iran's missile and space programmes have sparked concern in the West that such advanced technologies, combined with the nuclear know-how which the nation is acquiring, may enable Tehran to produce an atomic weapon.

Tehran denies its nuclear programme has military aims.

Jafari's remarks come as Iran holds celebrations to mark the 32nd anniversary of its Islamic revolution which toppled the US-backed shah.

Iran uses the run-up to the February 11 anniversary to tout its scientific and technological achievements.

Iran unveils 4 new satellites

Iran says it has built four new domestically produced satellites as part of a space program that's worrying other nations.

State TV showed President Mahmoud Ahmadinejad unveiling the satellites — Fajr, Rasad, Zafar and Amir Kabir-1 — on Monday at a ceremony in Tehran.

State TV described them as research satellites but did not provide details. Iran says it has launched at least two satellites and has none in orbit now.

Many nations in the West and Middle East fear Iran's space program could also bolster its ballistic missile program and ability to conduct space-based surveillance. The U.S. and other countries have cited fears that Iran's nuclear program and missile program could allow it to target Europe and Israel with atomic weapons.