Walkie-talkies and solar equipment exploded in Beirut and other parts of Lebanon on Wednesday in an apparent second wave of attacks targeting devices a day after pagers used by Hezbollah blew up, state media and officials for the militant group said.

One Hezbollah official said the episode was the biggest security breach in the group's history. The operations, which appeared to throw Hezbollah into disarray, played out alongside Israel's 11-month-old war in Gaza and heightened fears of an escalation on its Lebanese border and the risk of a full-blown regional war.

Hezbollah officials and Lebanon's state media say explosions went off in Beirut and multiple parts of Lebanon in an apparent second wave of detonations of electronic devices. The officials and state media said Wednesday that walkie-talkies and even solar equipment detonated a day after hundreds of pagers blew up.