How pagers and hand-held radios can be modified to remotely explode
Sky News’ Data and Forensics team has spoken to four experts to answer the question – how does a pager or hand-held radio explode?
The pagers that exploded in Lebanon on Tuesday are consistent with the AR-924 model of pager with Gold Apollo branding.
The Taiwan-based company has distanced itself from the devices, saying they were made under licence in Budapest by a firm called BAC Consulting.
The chief executive of BAC Consulting, Cristiana Barsony-Arcidiacono, told NBC News, Sky News’ US partner: “I don’t make the pagers. I am just the intermediate. I think you got it wrong.”
Meanwhile, Icom, the Japanese maker of the brand of walkie-talkies linked to the deadly blasts, has said it stopped making the model a decade ago and it would be impossible to lace them with explosives during manufacturing.
Read more: The Budapest firm linked to explosive pagers
So while it might not be clear at what stage the pagers or radios could have been turned into bombs, experts can say how it might have been done.
The remains of what is said to be one of the exploding pagers
First, let’s look at the explosive – you only need a very small amount, a gram or two is enough to “explode someone’s arm or face”, says Dr Eyal Pinko, a former Israeli navy and intelligence operative.
It is not yet clear exactly what type of explosive was used. There have been unverified reports pentaerythritol tetranitrate, or PETN, was used. Experts told Sky News it also could have been TNT or another equivalent.
“The point is that you can mix them in with another component effectively to make a plastic explosive,” Andrea Sella, professor of chemistry at University College London, says.
“So that means that you could conceivably insert some of this stuff into the nooks and crannies [of a pager].”
The explosives could have been in the battery, inside a detonating device or hidden elsewhere in the pager, Dr Pinko says.
Middle East latest: Pagers and walkie-talkies banned on Lebanon flights
But once the explosives are in the pager, how can it be remotely detonated?
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Lebanon explosions: What happened?
The other thing that will likely have been added to the pager is a detonator, says Carl Robson, who used to be a British army bomb disposal operator and is now a bomb disposal project manager for Igne UXO.
A detonator is a “small cylindrical barrel” which, even without any added explosives, would easily cause injury once initiated, Mr Robson says.
To initiate the detonator, you need a power source. In this case, that is the battery for the pager
But how does the battery set off the detonator?
You need a trigger – Mr Robson compares it to a light switch, and in this case, the flick of a switch is a particular message being sent to the pager.
This message, which could have been a specific string of letters or symbols, is identified and “starts creating the explosive chain”, Dr Pinko explains.
“Which means that it takes a current from the battery, heating the explosive to the level of energy which is needed. And then [the explosion] occurs.
“You only need a fraction of a second [of heating] to get this kind of explosion,” he adds.
Sean Moorhouse, a former British Army officer and explosive ordnance disposal expert, puts it another way: “Normally the pager beeps when you [get a message]. What they’ve done is they said, ‘OK, instead of beeping, send the charge that normally goes to the beeper to the detonator instead’.”
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Lebanon explosions: What happened?
But he says there’s still a question mark over how the pager was programmed to react to the message.
Read more:
Pagers modified by Israel ‘at production level’
How Israel is suspected of using technology against its enemies
Videos of the pager and radio explosions suggest a “very similar method” was used to cause the explosion, Mr Robson says.
The size of the blasts caught on camera also suggest there was an “extremely consistent” amount of explosives used across the different devices.
But it’s also possible some of the radios contained more explosives.
“Naturally, if you look at a two-way radio against the pager, there is the capability to put a lot more explosives in it.”
That could create a “bigger blast radius”, potentially doing more damage, he says.
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The second wave of explosions killed 20 people, while 12 people died and almost 3,000 more were injured when the pagers exploded.
Mr Robson says the higher death rate could have been down to the nature of the communication devices – hand-held radios are more likely to be used in crowded places, while pagers are carried at all times.
The Data and Forensics team is a multi-skilled unit dedicated to providing transparent journalism from Sky News. We gather, analyse and visualise data to tell data-driven stories. We combine traditional reporting skills with advanced analysis of satellite images, social media and other open source information. Through multimedia storytelling we aim to better explain the world while also showing how our journalism is done.
World
Arrest warrants issued for Israeli PM Netanyahu and former defence secretary Gallant and senior Hamas commander over alleged war crimes
Arrest warrants have been issued for Israeli Prime Minister Benjamin Netanyahu, former defence secretary Yoav Gallant and a senior Hamas commander by the International Criminal Court (ICC).
The warrants against the senior Israeli figures are for alleged war crimes and crimes against humanity related to the war in Gaza that Israel launched following the 7 October attacks by Hamas.
The prime minister’s office said the warrants against him and Gallant were “anti-semitic” and said Israel “rejects with disgust the absurd and false actions”.
Another warrant was issued for the arrest of Hamas leader Mohammed Diab Ibrahim al Masri for alleged war crimes and crimes against humanity.
Al Masri, also known as Mohammed Deif, was the mastermind behind the 7 October attacks. It is unclear if he is still alive, following an airstrike that Israel claimed killed him earlier this year.
Neither Israel nor the US are members of the ICC. Israel has rejected the court’s jurisdiction and denies committing war crimes in Gaza.
US President Joe Biden described the warrants against Israeli leaders as “outrageous”, adding “whatever the ICC might imply, there is no equivalence – none – between Israel and Hamas”.
Former Israeli prime minister Naftali Bennett said the warrants for Netanyahu and Gallant were a “mark of shame” for the ICC.
The court originally said it was seeking arrest warrants for the three men in May for the alleged crimes and today announced that it had rejected challenges by Israel and issued warrants of arrest.
The new UK Labour government said in the summer it would not oppose the ICC’s right to issue the warrants.
Benjamin Netanyahu addresses the UN general assembly. Pic: Reuters
Warrants for Netanyahu and Gallant
In its update, the ICC said it found “reasonable grounds to believe” that Netanyahu and Gallant “bear criminal responsibility” for alleged crimes.
These, the court said, include “the war crime of starvation as a method of warfare; and the crimes against humanity of murder, persecution, and other inhumane acts”.
Netanyahu previously spoke of his “disgust” at the suggestion the ICC would seek an arrest warrant for him.
The Board of Deputies of British Jews said the ICC’s decision sent a “terrible message”.
“The court has minimised how Hamas fights – deliberately from within civilian infrastructure and cruelly using Palestinian civilians as human shields, tragically leading to many casualties,” the board said.
“Democratic governments, and people around the world, should consider how they would have responded to an October 7th perpetrated against their country, involving mass murder, rape, and hostage-taking.
“We should all be focused on defeating the Hamas terrorists, liberating the hostages, ensuring that civilians in Gaza receive all necessary aid and working towards a sustainable peace for Israelis and Palestinians to prevent these horrible conflicts in the future.
“The decision of the ICC is counter-productive in all these respects.”
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A video released by Hamas in 2005 shows a man identified as Mohammed Deif. Pic: AP
Warrant for Hamas leader
The ICC also said it has issued an arrest warrant for Hamas leader Al Masri, saying it has “reasonable grounds to believe” that he is responsible for crimes against humanity including murder, extermination, torture, rape, as well as war crimes including taking hostages.
Discussing the 7 October attacks, the court said: “In light of the coordinated killings of members of civilians at several separate locations, the Chamber also found that the conduct took place as part of a mass killing of members of the civilian population, and it therefore concluded that there are reasonable grounds to believe that the crime against humanity of extermination was committed.”
In its statement, the ICC said the prosecution was not in a position to determine whether Al Masri is dead or alive, so was issuing the arrest warrant.
The court previously said it was seeking an arrest warrant for Ismail Haniyeh, the leader of Hamas who was subsequently killed in July.
The home secretary has refused to say if Israeli Prime Minister Benjamin Netanyahu would be arrested if he landed on British soil after an international arrest warrant was issued for him.
On Thursday, the International Criminal Court (ICC) issued arrest warrants for Netanyahu and former Israeli defence secretary Yoav Gallant for alleged war crimes and crimes against humanity related to the war in Gaza.
But Yvette Cooper said the ICC, which the UK is a member of, is independent and while the government respects that, it “wouldn’t be appropriate for me to comment” on the processes involved.
She told Sky News: “We’ve always respected the importance of international law, but in the majority of the cases that they pursue, they don’t become part of the British legal process.
“What I can say is that obviously, the UK government’s position remains that we believe the focus should be on getting a ceasefire in Gaza.”
However, Emily Thornberry, Labour chair of the foreign affairs committee in parliament, told Sky News: “If Netanyahu comes to Britain, our obligation under the Rome Convention would be to arrest him under the warrant from the ICC.
“Not really a question of should, we are required to because we are members of the ICC.”
The government said after winning July’s election it would not oppose the ICC’s right to issue the warrants.
An ICC arrest warrant was also issued for Hamas leader Mohammed Diab Ibrahim al Masri, the mastermind behind the 7 October attacks in Israel, for alleged war crimes and crimes against humanity.
Israel claims Al Masri was killed earlier this year but the ICC said that has not been confirmed, so it was issuing the arrest warrant.
Benjamin Netanyahu and Yoav Gallant (right) have arrest warrants against them. File pic: Reuters
Netanyahu’s office said the warrants against him and Gallant were “anti-semitic” and said Israel “rejects with disgust the absurd and false actions”.
Neither Israel nor the US are members of the ICC. Israel has rejected the court’s jurisdiction and denies committing war crimes in Gaza.
US President Joe Biden described the warrants against Israeli leaders as “outrageous”, adding: “Whatever the ICC might imply, there is no equivalence – none – between Israel and Hamas.”
Former Israeli prime minister Naftali Bennett said the warrants for Netanyahu and Gallant were a “mark of shame” for the ICC.
The Board of Deputies of British Jews said the ICC’s decision sent a “terrible message”.
Hungarian Prime Minister Viktor Orban said on Friday he would invite Netanyahu to visit Hungary and he would guarantee the arrest warrant would “not be observed”.
However, both France and Italy signalled they would arrest Netanyahu if he came to their countries.
Read more:
What satellite images tell us about North Gaza
Hamas ready for Gaza ceasefire ‘immediately’
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Why have arrest warrants been issued?
The ICC originally said it was seeking arrest warrants for the three men in May for the alleged crimes and on Thursday announced that it had rejected challenges by Israel and issued warrants of arrest.
In its update, the ICC said it found “reasonable grounds to believe” that Netanyahu and Gallant “bear criminal responsibility” for alleged crimes.
These, the court said, include “the war crime of starvation as a method of warfare; and the crimes against humanity of murder, persecution, and other inhumane acts”.
It is the first time a sitting leader of a major Western ally has been accused of war crimes and crimes against humanity by a global court of justice.
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