TEHRAN: The unmanned U.S. spy plane was deep inside Iran’s airspace, flying over an eastern town famous for Persian carpets and saffron when it was downed by Iranian armed forces, state radio reported Wednesday.

The report said the stealth-version of the RQ-170 drone had been detected by Iranian forces over the eastern town of Kashmar, some 225 kilometers from the border with Afghanistan.

“The U.S. smart plane was captured by Iranian anti-aircraft units somewhere in the sky over Kashmar in the east of the country,” the radio said. It did not speculate as to why the drone flew over the town, which lies in an agricultural area known for the production of saffron and Persian carpets.

The radio added that Iran will “soon” broadcast video footage of the downed drone.

Iran first reported the downing Sunday but did not say when the incident happened. At the time, the official IRNA news agency said Iran’s armed forces had shot it down – a claim later rejected by U.S. officials who said the drone crashed over the weekend but that there was no indication it had been shot down.

Meanwhile, U.S. officials, speaking on condition of anonymity to discuss classified information, have said the drone had spied on Iran for years from a U.S. air base in Afghanistan.

According to these officials, the U.S. built up the air base in Shindad, Afghanistan, with an eye to keeping a long-term presence there to launch surveillance special-operations missions into Iran if deemed necessary.

The RQ-170 – known as the Sentinel – has been used in Afghanistan for several years. It gained notoriety earlier this year when officials disclosed that one was used to keep watch on Osama bin Laden’s compound in Pakistan as the raid that killed him was taking place.

Iran’s hard-line Kayhan daily quoted Wednesday an unidentified military expert as saying Iranian forces did not shoot down the drone. The expert, though, said the Iranian military was capable of bringing it down in such a way that the “body of the plane and its parts remain intact.”

Another conservative daily, Mellat, said Iran may transfer intelligence from the drone to regional allies Syria and Lebanon’s militant Hezbollah group.

Iran confirmed for the first time in 2005 that the U.S. has been flying surveillance drones over its airspace to spy on its nuclear and military facilities.

In January, Tehran said two pilotless spy planes shot down over its airspace were operated by the U.S., and in July, media said Iranian military officials showed Russian experts several U.S. drones reportedly shot down in recent years.

Faced with international sanctions over its controversial nuclear program, Iran has been trying to build up its own military technology.

It unveiled its first domestically built unmanned bomber in 2010, calling the aircraft an “ambassador of death” to Iran’s enemies. Two years earlier, Tehran announced it had built an unmanned aircraft with a range of more than 1,000 kilometers, far enough to reach Israel.