https://www.cnn.com/world/live-news/lebanon-pagers-attack-hezbollah#h_fae744b5f17886dd7ce2bec9ff9ab047

How was this pulled off? Here are the theories From CNN's Christian Edwards

Experts have shared two competing theories as to how hundreds of pagers could have exploded simultaneously.

One theory is that there was a cybersecurity breach, causing the pagers’ lithium batteries to overheat and detonate.

Another is that this was a “supply chain attack,” where the pagers were tampered with during the manufacturing and shipping process.

David Kennedy, a former US National Security Agency intelligence analyst, told CNN that the explosions seen in videos shared online appear to be “too large for this to be a remote and direct hack that would overload the pager and cause a lithium battery explosion.”

Kennedy said he found the second theory to be more plausible.

“It’s more likely that Israel had human operatives… in Hezbollah… The pagers would have been implanted with explosives and likely only to detonate when a certain message was received,” he said.

“The complexity needed to pull this off is incredible. It would have required many different intelligence components and execution. Human intelligence (HUMINT) would be the main method used to pull this off, along with intercepting the supply chain in order to make modifications to the pagers,” he added.