Hundreds of pagers carried by Hezbollah members blew up nearly simultaneously in an attack that tops a series of covert assassinations and cyber-attacks in the region.

A source close to Lebanon's Hezbollah said walkie talkies used by its members exploded in the group's Beirut stronghold, with a live stream on social media showing the chaos that unfolded during the explosion.

Pagers used by the militant group Hezbollah simultaneously exploded, injuring more than 2,800 people and killing at least nine, officials said.