Lebanon's state-run National News Agency said the blasts involved walkie-talkies used by the group and pagers. Some of the explosions reportedly took place inside homes in Beirut and at least one happened at a funeral.
At least nine people were reported killed and 300 injured in the latest attack, on top of the 12 dead and thousands hurt on Tuesday.
Earlier Wednesday, multiple reports said Israel's Mossad spy agency planted small amounts of explosive material in Hezbollah pagers that detonated across Lebanon on Tuesday.
More:Hundreds of Hezbollah pagers explode across Lebanon injuring thousands
The coordinated blasts Tuesday emanated from hand-held wireless communication devices as people shopped for groceries, sat in cafes and drove in cars, leaving blood-splattered scenes.