Israel’s apparent ability to infiltrate global supply chains has sent ripples of fear through Iran’s network of armed groups across the Middle East.

The simultaneous explosion of thousands of pagers used by Lebanese militia Hezbollah on Tuesday was the result of an unprecedented weaponization of a wireless paging system, in which rigged devices detonated upon receiving a coded signal transmitted by radio frequency.

In a period replete with violent attacks across the region—from Israel’s bombardment of the Gaza Strip to the targeted assassinations of militant leaders in Iran and Lebanon—this was perhaps the most sophisticated and daring one yet.

Explosions in Beirut have intensified unrest, with solar energy systems now reportedly exploding after previous blasts involving pagers and walkie-talkies tied to Hezbollah.

Israel launched a series of strikes on Hezbollah targets Thursday as the war against the Lebanon-based group widened in the wake of two consecutive days of deadly explosions triggered in wireless devices.

The deadly Hezbollah-pager explosions are causing mounting distrust, with some Lebanon residents abandoning their electronic devices.