Iran flexes muscles with new home-grown missile defence system amid rising US tensions
Iranian officials have previously called Bavar-373 the Islamic republic's first domestically produced long-range missile defence system.
Tehran began making Bavar - which means "believe" - after the purchase of Russia's S-300 system was suspended in 2010 due to international sanctions.
President Hassan Rouhani attended the unveiling ceremony for the mobile surface-to-air system and ordered it to be added to Iran's missile defence network, state news agency IRNA reported.
"The long-range Bavar-373 missile system is suited to Iran's geography with a range of more than 200 kilometres (124 miles) ... and competes with Russian and American systems such as S-300 and Patriot," IRNA said.
The system is "better than S-300 and close to S-400", Rouhani said in televised remarks after the ceremony, held on Iran's "national defence industry day".
Pictures released by his office showed the system mounted on the back of military trucks in Tehran.
Iran installed the S-300 system in March 2016 following several years of delays, after a nuclear agreement reached with world powers the previous year allowed the lifting of international sanctions.
Thursday's unveiling takes place against a backdrop of rising tensions with Washington since President Donald Trump last year withdrew the United States from the nuclear deal and reimposed sanctions.
Iran shot down a US Global Hawk drone with a surface-to-air missile in June for allegedly violating its airspace, which the United States denies.
The US urged the United Nations on Tuesday to extend an arms embargo on Tehran that is due to expire next year as part of the embattled Iran nuclear deal.
Secretary of State Mike Pompeo told the UN Security Council that the clock was ticking on a resolution restricting weapons sales to Iran that is due to end in October 2020.
Pompeo warned that the expiration of provisions in Security Council Resolution 2231 would also see a travel ban on a key Iranian commander lifted.
"Time is drawing short to continue this activity of restricting Iran's capacity to foment its terror regime," he said.
"The international community will have plenty of time to see how long it has until Iran is unshackled to create new turmoil, and figure out what it must do to prevent that from happening," Pompeo added.
The resolution was passed as part of the Joint Comprehensive Plan of Action, otherwise known as the Iran nuclear deal which the US, Russia, China, France, Germany and Britain agreed with Tehran in 2015.
The landmark deal was designed to curb Iran's nuclear programme in exchange for sanctions relief.
President Donald Trump unilaterally withdrew the US from the deal last year and reinstated economic sanctions, sending tensions between Washington and Tehran soaring.
When the resolution expires next year, travel restrictions on Qasem Soleimani, the commander of Iran's Quds Force, which operates abroad, and 23 other Iranians will be lifted.
"We believe that the UNSC has an important role to play to ensure that the arms embargo and the travel ban are continued," Brian Hook, the US Special Representative for Iran told reporters in New York ahead of Pompeo's remarks.
Trump's administration is currently pursuing a "maximum pressure" campaign designed to force the Islamic republic to limit its nuclear programme and military activities.
Iran has responded by suspending some of its commitments under the nuclear deal.
Meanwhile, the US has been struggling to piece together an international coalition to protect cargo ships travelling through the Gulf.
Allies are concerned about being dragged into conflict with Iran while European countries are trying to keep the nuclear deal alive.
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