One member of the group received a new pager on Monday that exploded the next day while it was still in its box, said one of the sources.
A pager given to a senior member just days earlier injured a subordinate when it detonated, a second source told Reuters.
A day after the explosions of the pagers, hundreds of Hezbollah walkie-talkies exploded in Beirut.
The batteries of the walkie-talkies were laced with a highly explosive compound known as PETN, a Lebanese source familiar with the device's components told Reuters on Friday. Up to three grams of explosives hidden in the pagers had gone undetected for months by Hezbollah, Reuters reported earlier this week.
One of the security sources said it was very hard to detect the explosives "with any device or scanner." The source did not specify what type of scanners Hezbollah had run the pagers through. READ MORE
