It's unclear when or where the rocket was launched, but the announcement on Iranian state television on Sunday came after satellite photos showed preparations at Imam Khomeini Spaceport in Iran's rural Semnan province, the site of Iran's frequent failed attempts to put a satellite into orbit.
State-run media aired dramatic footage of the blast-off against the backdrop of heightened tensions over Tehran's nuclear program, which is racing ahead under decreasing international oversight.
Iran had previously acknowledged that it planned more tests for the satellite-carrying rocket, which it first launched in February of last year.
Ahmad Hosseini, spokesman for Iran's Defense Ministry, said Zuljanah, a 25.5 metre-long rocket, was capable of carrying a satellite of 220 kilograms that would ultimately gather data in low-earth orbit and promote Iran's space industry. Zuljanah is named for the horse of Imam Hussein, the grandson of the Prophet Muhammad.
The White House said it was aware of Iran's announcement and criticised the move as "unhelpful and destabilising."
The launch comes just a day after the European Union's foreign policy chief, Josep Borrell, traveled to Tehran in a push to resuscitate negotiations over Iran's nuclear program that have been at stalemate for months. A few significant sticking points remain, including Tehran's demand that Washington lift terrorism sanctions on its paramilitary Revolutionary Guard.
Borrell said on Saturday that talks over the nuclear deal would resume in an unnamed Persian Gulf country in the coming days, with Iranian media reporting that Qatar would likely host the negotiations.
Former President Donald Trump withdrew the US from the nuclear deal in 2018 and reimposed crushing sanctions on Iran. Tehran responded by greatly ramping up its nuclear work and now enriches uranium closer than ever to weapons-grade levels.
In a further escalation that limits the international community's view into its nuclear program, Iran removed over two dozen International Atomic Energy Agency cameras from its nuclear sites this month. The agency's director called the move a "fatal blow" to the tattered nuclear deal.
Tehran's rocket launches have raised alarm in Washington amid the unraveling of the nuclear deal. The US warns the launches defy a United Nations Security Council resolution calling on Iran to steer clear of any activity related to ballistic missiles capable of delivering nuclear weapons.
The White House on Sunday said it was committed to using sanctions and other measures to prevent further advances in Iran's ballistic missile program.
The US intelligence community's 2022 threat assessment, published in March, claims such a satellite launch vehicle "shortens the timeline" to an intercontinental ballistic missile for Iran as it uses "similar technologies."
Iran, which long has said it does not seek nuclear weapons, maintains its satellite launches and rocket tests do not have a military component.
