The officials said Israel established a base for launching explosive drones inside Iran, and the drones were later used to target missile launchers near Tehran.

Precision weapons were also smuggled in and used to target surface-to-air missile systems, clearing the way for Israel’s Air Force to carry out more than 100 strikes with upward of 200 aircraft in the early hours of Friday local time.

The plan to disable Iranian defences seems to have been effective; Israel said all of its aircraft returned safely from the first waves of strikes, appearing to show Israeli air superiority over parts of a country hundreds of miles away.

Intelligence gathered by the Mossad in Iran also gave Israel’s air force the ability to target senior Iranian commanders and scientists.

In an incredibly rare move, the Mossad released video from some of its operations, showing drones attacking what appear to be unsuspecting missile launchers.

It is the latest operation to show how deeply Israel’s intelligence services, including the Mossad, have penetrated some of Iran’s most closely guarded secrets.

The operations have made the Mossad appear a nearly unstoppable force in Iran, capable of hitting at some of its highest-ranking officials and most sensitive sites.

“Mossad has treated Iran like its playground for years now,” said Holly Dagres, a senior fellow at the Washington Institute and curator of the Iranist newsletter.

“From assassinating top nuclear scientists to sabotaging Iranian nuclear facilities, Israel has proved time and time again that it has always had the upper hand in this shadow war that has now been playing out in the open since the first tit-for-tat strikes in April 2024.”

An Israeli security source said the latest operation required commando forces operating deep within Tehran and across the country while avoiding detection from Iran’s security and intelligence agencies.

The source said Mossad teams targeted air defence missiles, ballistic missiles, and missile launchers as the attack from the Israeli Air Force began.

A second Israeli security source said the Mossad operations were years in the making, involving both intelligence-gathering efforts and the deployment of Mossad commandos deep behind enemy lines.

Some of the Mossad commando forces operated in the Iranian capital itself, according to the security source.

In addition to the drone base established by the Mossad long before Wednesday’s attack, Mossad commandos deployed “precision-guided weapons systems” near Iranian missile air defence systems, which were activated at the same time as the Israeli air force began striking its targets.

A second operation deployed sophisticated vehicle-mounted weaponry to target other Iranian defence systems.

The Mossad operation also involved assassinations of top Iranian officials.

Israel has shown – flaunted even – the Mossad’s ability to operate with near impunity in Iran in the past.

Starting in the early-2010s, Iran accused Israel of carrying out a campaign of assassinations against the country’s nuclear scientists.

Former Defence Minister Moshe Ya’alon tacitly acknowledged the targeted killings when he said in 2015 that Israel cannot be held responsible “for the life expectancy of Iran’s nuclear scientists.”

From 2007 to 2012 Israel allegedly carried out five covert assassinations, nearly all in Tehran, through remote-controlled bombings, or remote-controlled machine guns.

Only one of Iran’s key nuclear scientists survived the assassination attempt, Fereydoon Abbasi.

Just last month, Abbasi told Iranian state media that any attack on production sites would have little impact on the timeline of developing a bomb, saying, “our capabilities are spread all over the country.

If they target production sites, it will be inconsequential to our timetable, because our nuclear materials are not stored above ground for them to hit.”

Abbasi was one of the scientists killed in Israel’s early morning attack in Tehran.

The Mossad’s actions soon became much more public.

In early-2018, Israel stole Iran’s nuclear archive from Tehran, displaying the intelligence coup in a live broadcast from Jerusalem.

Speaking in English, Netanyahu showed off the archive, including what he said were copies of 55,000 pages of Iranian nuclear information and a display of discs he said were 55,000 files.

Iran tried to dismiss Netanyahu’s comments as “childish” and “laughable,” but the plundering of the archive showed the confidence Israel had in the Mossad’s ability to function in Tehran.

The operation, which would have required extensive planning and an intimate knowledge of the archive’s location and security, pushed the first Trump administration to withdraw from the original nuclear agreement with Iran, known as the Joint Comprehensive Plan of Action (JCPOA).

In November 2020, Israel assassinated Mohsen Fakhrizadeh, Iran’s chief nuclear scientist, while he was in a bulletproof car travelling with his wife.

Fakhrizadeh’s car was moving in a convoy with three security vehicles when he came under fire.

Iranian state media said a remote-controlled machine gun opened fire on the nuclear scientist, who had been a long-time target for Israel.

The operation, which Israel has not publicly acknowledged, was carried out with remarkable precision, and it displayed a deep knowledge of Fakhrizadeh’s pattern of life.

And yet despite its repeated inability to stop the Mossad, Iran has proven incapable of improving.

Ram Ben Barak, the former deputy director of the Mossad, said the organisation’s continued success is “due to a very, very disliked regime, even hated by most of the public, so this allows for intelligence penetration on one hand, and on the other, you have the sophistication and professionalism of the Israeli intelligence personnel.”

After the start of the war in Gaza, Israel assassinated Hamas political leader Ismail Haniyeh in the heart of Tehran.

A source familiar with the matter said Israel planted an explosive device in a guest house where Haniyeh was known to stay.

The bomb was concealed in the room for two months before the targeted killing and detonated remotely once Haniyeh was in the room.