Hezbollah pagers: How did they explode and who is responsible?

From the article:

Why does Hezbollah use pagers?

Hezbollah has relied heavily on pagers as a low-tech means of communications to try to evade location-tracking by Israel.

BBC reported they switched to pagers after they realized Israel was using mobiles to target leaders for assassination.

They are still very common in hospital settings. Those things are reliable as fuck.

Pagers pierce walls way better than most tech. It's why a lot of hospitals still use them.

Are you iphone dunking on middle eastern terrorist communications?

Who uses pagers today?

Hezbollah, apparently.

NPR was saying earlier that they weren't the old-style pagers from the 90s, these are more like low-tech burner phones

Judging from what I've seen so far from reports which are early and incomplete, I would eduguess that Mossad basically intercepted a particular brand of these 'pagers' known to be used by Hezbollah, put small bombs in them and wired them in such that they could be activated by a broadcast signal, and probably a lot of non Hezbollah people who just happened to buy this model of 'pager' in the target areas and timeframe for introduction of these tampered device onto the market also got an exploding hot pocket.