Iran will be ‘waking up sleeper agents across West’, says former Israeli general

Shiite Muslims throw stones toward paramilitary soldiers and police officers during a protest to condemn the killing of Iranian Supreme Leader Ayatollah Ali Khamenei, at near the U.S. Consulate in Karachi, Pakistan, Sunday, March 1, 2026. (AP Photo/Ali Raza)
Protestors throw stones toward paramilitary soldiers and police officers during demonstrations to condemn the killing of Iranian Supreme Leader Ayatollah Ali Khamenei, at near the U.S. Consulate in Karachi, Pakistan (Picture: AP)

The Iranian regime will be waking up sleeper agents in the West to avenge the death of Ayatollah Ali Khamenei, an ex-intelligence chief in the Israeli army has warned.

Brig. Gen. (Res.) Yossi Kuperwasser said ‘dormant’ pro-Regime forces could carry out terror attacks to destabilise the US and its supporters.

It comes as one of Iran’s most senior grand ayatollahs declared it a religious obligation for all Muslims to avenge the death of the country’s supreme leader.

Iran’s foreign ministry also vowed that repercussions for Ali Khamenei’s assassination ‘will extend to the world’.

The 86-year-old dictator was found dead in the rubble following an airstrike on his compound on Saturday.

Kuperwasser, a former head of the Research Division at the Israel Defense Forces’ Intelligence Corps, said the Iranian regime had supporters around the world.

Yossi Kuperwasser (Picture: IDSF)
Yossi Kuperwasser was a senior intelligence figure in the IDF (Picture: IDSF)
TOPSHOT - People mourn the death of Iran's Supreme Leader Ayatollah Ali Khamenei, who was killed in joint US and Israeli strikes, at a square in Tehran on March 1, 2026. Ayatollah Ali Khamenei, Iran's supreme leader since 1989 and sworn enemy of the West, was killed in the opening salvo of a massive US and Israeli attack that extended into a second day on March 1, as the two powers seek to topple the Islamic republic. (Photo by ATTA KENARE / AFP via Getty Images)
People mourn the death of Iran’s Supreme Leader Ayatollah Ali Khamenei at a square in Tehran (Picture: ATTA KENARE / AFP via Getty Images)

He told Metro: ‘The regime has dormant cells that could try and carry out terror attacks.

‘These cells are around the globe for such an eventuality, and they are probably working to wake them up now.

‘These attacks and other steps will be aimed at destabilising and charging a price for those who were responsible for what happened to Khamenei.’

The former general, who heads the Jerusalem Institute for Strategy and Security, said these dormant cells were in place ‘in the United States and elsewhere’ where there are dissident Iranian communities.

Kuperwasser pointed to the violent clashes between protesters and police in Kirachi, Pakistan, as a sign of the Iranian regime’s influence abroad.

A mob of hundreds of pro-Iranian demonstrators stormed the US consulate in the Pakistani capital, vandalising the property and setting parts of the building on fire.

At least nine protestors were reportedly killed and dozens wounded.

The intelligence expert said that intelligence agencies will be focused on identifying these dormant cells in the West and identifying what steps they could plan to take.

He added: ‘They were dormant until now, but somebody is going to wake them up. We have to be wary now and careful of their capabilities.’

Mandatory Credit: Photo by Dominika Zarzycka/SOPA Images/Shutterstock (16718396h) An Iranian hold Israeli flag and chant 'Long live Iran, long live Israel' as Iranians stage a protest in front of the Iranian Embassy in London to show their support to a regime change in Iran in the face of Israeli and the US attack on Iran. Early Saturday morning (February 28) the USA and Israeli forces started an air attack on Iran. Mamy military and civilian sites were destroyed, over 200 people are believed to be killed, the whereabouts of Iranian supreme leader Ali Khomenei are unknown. Iran started retaliatory air strikes. Iranians stage a protest against the Islamic regime in Iran, in London, UK - 28 Feb 2026
An Iranian hold Israeli flag and chant ‘Long live Iran, long live Israel’ as Iranians stage a protest in front of the Iranian Embassy in London to show their support to a regime change in Iran (Picture: Dominika Zarzycka/SOPA Images/Shutterstock)
Pakistani Shiite Muslims in solidarity with Iran clash with police during an anti-US-Israel protest in Lahore on March 1, 2026. Iranian state television confirmed the death of its supreme leader Ayatollah Ali Khamenei and launched a fresh wave of attacks on March 1, as Israel hit back at the capital Tehran. In Pakistan, eight people were killed as hundreds of protesters tried to storm the US consulate in the megacity of Karachi, the local rescue service said. (Photo by Arif ALI / AFP via Getty Images)
Pro-regime forces are engaged in violent clashes in Kirachi, Pakistan (Photo by Arif ALI / AFP via Getty Images)

Kupperwasser stressed that Iran would likely not target European countries because they had not been involved in the assassination of Khamenei.

The UK military has been involved in shooting down missiles and drones heading towards Qatar and other allies, defence secretary John Healey said.

He added that 300 British personnel were a few hundred yards away from a strike at a Bahrain military base and that missiles were also fired in the direction of Cyprus, where thousands of troops are stationed.

Hundreds of expat British-Iranians took to the streets of London last night to celebrate the death of Ayotollah Khamenei.

In the north London suburb of Golders Green, videos showed Israeli and Iranian flags being waved at the celebration as the local Jewish community heralded the news.

How are sleeper cells recruited and what triggers them?

Two members of the Iranian community in London previously told Metro that efforts to hire agents for underground activity are common when expats visits Iran.

Speaking on the condition of anonymity last July, both said these efforts are often refused.

B, 34, said: ‘They interrogate you in semi-friendly conditions.

‘They take you somewhere and potentially hold your passport until you talk with them. Then they ask you to perform some tasks for Iran.’

A building that was damaged by an Iranian drone attack, after Israel and the U.S. launched strikes on Iran, in Juffair, Manama, Bahrain, March 1, 2026. REUTERS/Hamad I Mohammed
A building that was damaged by an Iranian drone attack in Bahrain (Picture: REUTERS)

Sleeper cells snap into action for a variety of reasons that can be ‘virtually impossible to spot’.

‘There’ll be some sort of command,’ Prof Julian Richards, the Director of Centre of Security and Intelligence at the University of Buckingham, told Metro in July, when Israel and the US last struck Iran.

‘Either directly from Iran, but more likely from agents who are temporarily or permanently in the country, who know when and how to activate a particular sleeper cell.

‘It might be a message on the internet, or a coded message on a chat room or some sort of pre-arranged channel.’

What will happen next in the Middle East?

Speaking about the US and Israeli military operation in Iran, Kupperwasser said the IDF was prepared for the campaign to ‘take a long time’.

He said: ‘Iran have so many missiles and missile launchers. I don’t think we can end their capabilities anytime soon.

‘It will take a while until they can no longer hit Israel and other neighbouring countries.

‘By doing that, and attacking the leadership and the security forces, will make the people of Iran courageous enough to go onto the streets and take back the country from the hands of the Islamic radicals.’

He said that Israel had to be prepared for strikes to take ‘a week or two’ to achieve their military aims.

Palm Jumeirah hotel, Dubai (Picture: Chris Eubank Jr/Facebook)
The Fairmont Hotel was pictured engulfed in flames on Dubai’s Palm Jumeirah (Picture: Chris Eubank Jr/Facebook)
Smoke rises from a burning building hit by an Iranian drone strike, after Israel and the U.S. launched strikes on Iran, in Seef district, Manama, Bahrain, February 28, 2026. REUTERS/Hamad I Mohammed TPX IMAGES OF THE DAY
Smoke rises from a burning building hit by an Iranian drone strike, after Israel and the US launched strikes on Iran, in Seef district, Manama, Bahrain (Picture: Reuters)

As well as possibly calling into action sleeper agents in the West, the Iranians will also be hoping their proxy forces in the Middle East will join their cause, Kupperwasser added.

He said: ‘They are hoping that Hezbollah and the Houthis will join in.

‘But each one of them will have their own considerations.’

The ex-general explained that Hezbollah, which is based in Lebanon, will fear brutal Israeli retaliation, which could undermine their own powerbase in the region.

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