Crazy, that tactic sounds straight out of a science fiction novel - 80s science-fiction, given it's pagers, but still... I really wonder how they pulled it off. Did the IDF design the explosive pagers in the first place or did they find some insane hardware/software flaw that allowed that kind of remote explosion?
They had to be designed or modified to explode. Which makes it a big question of where they came from. Lots of legitimate ways Israel could have done it, and a lot of ways that could involve violating laws and treaties.