Hossein Dalirian wrote: "There has been no air attack from outside borders to Isfahan or other parts of the country."
He said Israel had "only made a failed and humiliating attempt to fly quadcopters [drones] and the quadcopters have also been shot down."
Iranian state media have reported similarly, saying that air defence
systems were activated in several areas of the country overnight to engage
possible targets, but there were no reports of any direct impact or
explosion.
It adds that all facilities, including nuclear facilities,
are safe.
Analysis
Israeli strike appears to be very limited in size and scope
Frank Gardner
Security correspondent
Israel made it clear it would respond, in some way, to Iran’s "swarm" attack of drones and missiles last weekend and now it seems it has.
If this is indeed the beginning and end of Israel’s response then it does appear to be very limited in size and scope.
Isfahan this morning looks normal.
All week Israel’s Western allies, notably the US and Britain, have been imploring its government not to carry out a heavy response to the Iranian missile attack.
Although that was a dramatic escalation, it was in itself a retaliation for Israel’s unprecedented air strike on Iran’s consulate in Damascus on 1 April that killed 13 people including two top generals.
How this develops now from here will depend on two things: Whether that is the end of Israel’s attack and whether Iran now decides to attack back.
Tehran's main airport resumes flights - Iran state media
Iran’s state news agency, IRNA, reports that flights have
resumed at Tehran’s Imam Khomeini International Airport.
Flights were earlier suspended across much of Iran as explosions
were reported in the central province of Isfahan.
Australia tells citizens to leave Israel
Australia is urging its citizens to leave Israel “if it’s safe to do so”, following reports of an Israeli strike on Iran.
“There’s a high threat of military reprisals & terrorist attacks against Israel & Israeli interests across the region. The security situation could deteriorate quickly,” the department of foreign affairs and trade said on its Smartraveller account on X.
“We urge Australians in Israel or the Occupied Palestinian Territories to depart,” it continued.
It also warned Australians in the region of airspace closures, flight cancellations and other travel disruptions.
Watch: Isfahan residents film explosions
Iranian state media said the country's air defences shot down three drones over Ifsahan.
Residents from the city have sent BBC Persian this footage of the explosions.
Video content
Video caption: Watch: Isfahan residents film explosionsWatch: Isfahan residents film explosions
Shadow war out in the open
Yolande Knell
Middle East correspondent, in Jerusalem
All week there’s been speculation about when and how Israel would retaliate for last weekend's unprecedented Iranian attack – which brought the shadow war between these two long-time enemies dangerously into the open.
Now, Iran’s Fars news agency says explosions have been heard near an army base in the city of Isfahan – activating local air defence systems.
Flights are reported to have been suspended over several Iranian cities.
On Saturday night, Iran launched more than 300 attack drones and missiles at Israel.
With the help of allies, most were downed before reaching Israeli territory. Israeli officials had indicated that they had to hit back for Iran’s strike to deter it from acting again.
Isfahan 'centre' of Iranian nuclear programme - former US official
Former US assistant secretary of state Mark Kimmitt has been speaking to BBC News about the significance of Isfahan and why Israel might have chosen it as the site of a strike.
“Isfahan really is to a great extent the centre of the Iranian
nuclear programme in terms of training, research and, what some would say, the
development of the Iranian nuclear capability.
“So it’s a likely site that Israel would hit because the
greatest fear the Israelis have is not continued missiles today but a nuclear
capability tomorrow.”
US officials have told CBS, the BBC's US partner, that an Israeli missile has struck Iran, but the scale of any strike, the exact target, and whether its target was hit remains unclear.
What we know so far
It's nearly two hours since we first heard reports of explosions in Iran. Here's what we know so far:
Two US officials have confirmed to the BBC's US partner CBS News that an Israeli missile has struck Iran
Early Friday morning, explosions were heard around the central city of Isfahan, Iranian media reported, saying three drones were destroyed after the country's air defence systems were activated
Isfahan is home to an Iranian air base and the province has several military sites. There are no reports so far that anything was hit and Iranian media says all nuclear facilities are safe
Meanwhile, several flights have been diverted around Iran's airspace, tracking sites show
Israel's military and the Pentagon have both declined to comment so far
Some background
It comes after Iran launched more than 300 missiles and drones towards Israel on 13 April in an unprecedented attack. Tehran has maintained this attack was in response to a suspected Israeli strike on its Syria consulate which killed 13 people
Israel and Western allies were able to down most of them before they reached Israeli territory
Israel had indicated that it would hit back to deter Iran from striking again, though international leaders have been urging the country to show restraint
Follow our live reporting on this story
We have live rolling coverage on the developments we've been bringing you this morning. Click play at the top of the page to follow along.
Iran state TV correspondent says Isfahan city is 'safe'
IRIBCopyright: IRIB
Iran's state broadcaster IRIB is downplaying the reports of an attack.
It has posted a video on Telegram showing one of its reporters standing on the top of a building in the centre of the city of Isfahan.
"The city is safe and sound, people are living their normal lives," he says.
"A couple of hours ago sounds were heard in the skies. From what we know, multiple mini drones were flying in the skies of Isfahan when they were targeted.
"So far, provincial authorities have not given us any information. Some outlets had said that Isfahan's nuclear facilities were targeted, but based on our research this information is false, no place has been targeted."
Sirens in northern Israel a false alarm, military says
Warning sirens which sounded over northern Israel early on Friday morning were a false alarm, the country's military has said, according to Reuters.
The sirens had sounded shortly after reports started to emerge of a possible Israeli strike on Iran.
Oil and gold prices jump while shares slide
Mariko Oi
Business reporter
ReutersCopyright: Reuters
Iran is the seventh largest oil producer in the worldImage caption: Iran is the seventh largest oil producer in the world
Global oil and gold prices have jumped and shares slumped after US officials said an Israeli missile had struck Iran.
In Asia trade on Friday morning, Brent crude rose by more than 3% to around $90 a barrel, while gold was trading close to a new record high above $2,400 an ounce.
Benchmark stock indexes in Japan, Hong Kong and South Korea also fell after the reports.
Investors have been closely monitoring Israel’s reaction to Iran's drone and missile attack last weekend.
Iran's National Security Council denies reports of emergency meeting - state TV
Iran's state broadcaster IRIB says the Supreme National Security Council's press office has "denied foreign media reports that an emergency meeting of the council has convened".
Three drones were destroyed over Isfahan - Iranian state TV
Iranian state TV has reported that three drones were observed over the sky in Isfahan at about 12:30 GMT and that they were destroyed after the country's air defence system was activated, according to Reuters.
Earlier, the semi-official Fars news agency reported that “explosions” had been heard near Isfahan’s international airport.
Isfahan province is home to a large air base, a major missile production complex and several nuclear sites.
Flight map shows diversions
As we've reported, there's significant flight diversion happening over the Iranian airspace.
Here's a screengrab of the flight traffic monitoring site FlightRadar24 from just a few minutes ago - it shows several planes changing route around central Iran.
FLIGHT RADAR 24Copyright: FLIGHT RADAR 24
BBC Persian receives videos from Isfahan residents
BBC Persian reports that it has been sent several videos filmed by residents of Iran's central Isfahan province overnight, where Iranian state media are reporting that explosions have been heard.
In one video posted on BBC Persian's Instagram account, the sound of what appear to be anti-aircraft guns can be heard.
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Reuters is reporting that sirens have sounded in northern Israel, citing the Israeli military.
There are no further details currently and the Israeli military says it is not commenting "at this time".
Isfahan nuclear facilities 'safe': Iran state TV
Iran’s state broadcaster IRIB is citing “reliable
sources” as saying that the nuclear facilities in Isfahan are “completely safe”
Isfahan home to nuclear sites and military airbase
Explosions were reported in Isfahan, about four hours drive or 350km (217 miles) south of Iran's capital, Tehran.
As we've reported, Isfahan is home to a major military air base and several Iranian nuclear sites are in the province- including the city of Natanz, a centerpiece of Iran’s
uranium enrichment program.
Live Reporting
Edited by Ayeshea Perera
All times stated are UK
New Analysis
Video caption: Watch: Isfahan residents film explosionsWatch: Isfahan residents film explosions 
-
Two US officials have confirmed to the BBC's US partner CBS News that an Israeli missile has struck Iran
-
Early Friday morning, explosions were heard around the central city of Isfahan, Iranian media reported, saying three drones were destroyed after the country's air defence systems were activated
-
Isfahan is home to an Iranian air base and the province has several military sites. There are no reports so far that anything was hit and Iranian media says all nuclear facilities are safe
-
Meanwhile, several flights have been diverted around Iran's airspace, tracking sites show
-
Israel's military and the Pentagon have both declined to comment so far
-
It comes after Iran launched more than 300 missiles and drones towards Israel on 13 April in an unprecedented attack. Tehran has maintained this attack was in response to a suspected Israeli strike on its Syria consulate which killed 13 people
-
Israel and Western allies were able to down most of them before they reached Israeli territory
-
Israel had indicated that it would hit back to deter Iran from striking again, though international leaders have been urging the country to show restraint
IRIBCopyright: IRIB 
ReutersCopyright: Reuters Iran is the seventh largest oil producer in the worldImage caption: Iran is the seventh largest oil producer in the world 
FLIGHT RADAR 24Copyright: FLIGHT RADAR 24 
BBCCopyright: BBC
Latest PostIran general reports 'no damage' in Isfahan - state media
Iranian state media are citing an army general in Isfahan province as saying that no damage has been reported.
"The strong sound heard in Isfahan was due to air defence firing at suspicious objects. There's been no damage,” he says.
No missile attack in Iran: official
There's been direct denial of a missile attack on Iran from an Iranian space agency official on X.
Hossein Dalirian wrote: "There has been no air attack from outside borders to Isfahan or other parts of the country."
He said Israel had "only made a failed and humiliating attempt to fly quadcopters [drones] and the quadcopters have also been shot down."
Iranian state media have reported similarly, saying that air defence systems were activated in several areas of the country overnight to engage possible targets, but there were no reports of any direct impact or explosion.
It adds that all facilities, including nuclear facilities, are safe.
Israeli strike appears to be very limited in size and scope
Frank Gardner
Security correspondent
Israel made it clear it would respond, in some way, to Iran’s "swarm" attack of drones and missiles last weekend and now it seems it has.
If this is indeed the beginning and end of Israel’s response then it does appear to be very limited in size and scope.
Isfahan this morning looks normal.
All week Israel’s Western allies, notably the US and Britain, have been imploring its government not to carry out a heavy response to the Iranian missile attack.
Although that was a dramatic escalation, it was in itself a retaliation for Israel’s unprecedented air strike on Iran’s consulate in Damascus on 1 April that killed 13 people including two top generals.
How this develops now from here will depend on two things: Whether that is the end of Israel’s attack and whether Iran now decides to attack back.
Tehran's main airport resumes flights - Iran state media
Iran’s state news agency, IRNA, reports that flights have resumed at Tehran’s Imam Khomeini International Airport.
Flights were earlier suspended across much of Iran as explosions were reported in the central province of Isfahan.
Australia tells citizens to leave Israel
Australia is urging its citizens to leave Israel “if it’s safe to do so”, following reports of an Israeli strike on Iran.
“There’s a high threat of military reprisals & terrorist attacks against Israel & Israeli interests across the region. The security situation could deteriorate quickly,” the department of foreign affairs and trade said on its Smartraveller account on X.
“We urge Australians in Israel or the Occupied Palestinian Territories to depart,” it continued.
It also warned Australians in the region of airspace closures, flight cancellations and other travel disruptions.
Watch: Isfahan residents film explosions
Iranian state media said the country's air defences shot down three drones over Ifsahan.
Residents from the city have sent BBC Persian this footage of the explosions.
Video content
Shadow war out in the open
Yolande Knell
Middle East correspondent, in Jerusalem
All week there’s been speculation about when and how Israel would retaliate for last weekend's unprecedented Iranian attack – which brought the shadow war between these two long-time enemies dangerously into the open.
Now, Iran’s Fars news agency says explosions have been heard near an army base in the city of Isfahan – activating local air defence systems.
Flights are reported to have been suspended over several Iranian cities.
On Saturday night, Iran launched more than 300 attack drones and missiles at Israel.
With the help of allies, most were downed before reaching Israeli territory. Israeli officials had indicated that they had to hit back for Iran’s strike to deter it from acting again.
Isfahan 'centre' of Iranian nuclear programme - former US official
Former US assistant secretary of state Mark Kimmitt has been speaking to BBC News about the significance of Isfahan and why Israel might have chosen it as the site of a strike.
“Isfahan really is to a great extent the centre of the Iranian nuclear programme in terms of training, research and, what some would say, the development of the Iranian nuclear capability.
“So it’s a likely site that Israel would hit because the greatest fear the Israelis have is not continued missiles today but a nuclear capability tomorrow.”
US officials have told CBS, the BBC's US partner, that an Israeli missile has struck Iran, but the scale of any strike, the exact target, and whether its target was hit remains unclear.
What we know so far
It's nearly two hours since we first heard reports of explosions in Iran. Here's what we know so far:
Some background
Follow our live reporting on this story
We have live rolling coverage on the developments we've been bringing you this morning. Click play at the top of the page to follow along.
Iran state TV correspondent says Isfahan city is 'safe'
Iran's state broadcaster IRIB is downplaying the reports of an attack.
It has posted a video on Telegram showing one of its reporters standing on the top of a building in the centre of the city of Isfahan.
"The city is safe and sound, people are living their normal lives," he says.
"A couple of hours ago sounds were heard in the skies. From what we know, multiple mini drones were flying in the skies of Isfahan when they were targeted.
"So far, provincial authorities have not given us any information. Some outlets had said that Isfahan's nuclear facilities were targeted, but based on our research this information is false, no place has been targeted."
Sirens in northern Israel a false alarm, military says
Warning sirens which sounded over northern Israel early on Friday morning were a false alarm, the country's military has said, according to Reuters.
The sirens had sounded shortly after reports started to emerge of a possible Israeli strike on Iran.
Oil and gold prices jump while shares slide
Mariko Oi
Business reporter
Global oil and gold prices have jumped and shares slumped after US officials said an Israeli missile had struck Iran.
In Asia trade on Friday morning, Brent crude rose by more than 3% to around $90 a barrel, while gold was trading close to a new record high above $2,400 an ounce.
Benchmark stock indexes in Japan, Hong Kong and South Korea also fell after the reports.
Investors have been closely monitoring Israel’s reaction to Iran's drone and missile attack last weekend.
Iran's National Security Council denies reports of emergency meeting - state TV
Iran's state broadcaster IRIB says the Supreme National Security Council's press office has "denied foreign media reports that an emergency meeting of the council has convened".
Three drones were destroyed over Isfahan - Iranian state TV
Iranian state TV has reported that three drones were observed over the sky in Isfahan at about 12:30 GMT and that they were destroyed after the country's air defence system was activated, according to Reuters.
Earlier, the semi-official Fars news agency reported that “explosions” had been heard near Isfahan’s international airport.
Isfahan province is home to a large air base, a major missile production complex and several nuclear sites.
Flight map shows diversions
As we've reported, there's significant flight diversion happening over the Iranian airspace.
Here's a screengrab of the flight traffic monitoring site FlightRadar24 from just a few minutes ago - it shows several planes changing route around central Iran.
BBC Persian receives videos from Isfahan residents
BBC Persian reports that it has been sent several videos filmed by residents of Iran's central Isfahan province overnight, where Iranian state media are reporting that explosions have been heard.
In one video posted on BBC Persian's Instagram account, the sound of what appear to be anti-aircraft guns can be heard.
Sirens sounded in northern Israel - military
Reuters is reporting that sirens have sounded in northern Israel, citing the Israeli military.
There are no further details currently and the Israeli military says it is not commenting "at this time".
Isfahan nuclear facilities 'safe': Iran state TV
Iran’s state broadcaster IRIB is citing “reliable sources” as saying that the nuclear facilities in Isfahan are “completely safe”
Isfahan home to nuclear sites and military airbase
Explosions were reported in Isfahan, about four hours drive or 350km (217 miles) south of Iran's capital, Tehran.
As we've reported, Isfahan is home to a major military air base and several Iranian nuclear sites are in the province- including the city of Natanz, a centerpiece of Iran’s uranium enrichment program.