The New York Times reports the electronic pagers had been manufactured by a company in Budapest, Hungary — BAC Consulting — that was actually a front company run by Israeli intelligence officers. Many of the pagers were obtained earlier this year after Hezbollah leader Sheikh Hassan Nasrallah warned against using cellphones to avoid Israeli surveillance.

On Wednesday, U.N. Secretary-General Antonio Guterres warned nations against weaponizing civilian objects.

Secretary-General António Guterres: “The logic of making all these devices explode is to do it as a preemptive strike before a major military operation. So, as important as the event in itself is the indication that this event confirms that there is a serious risk of a dramatic escalation in Lebanon, and everything must be done to avoid that escalation.”