Hezbollah has vowed to respond to an Israeli attack that killed multiple people and injured thousands across Lebanon on Tuesday when pagers belonging to members of the Iran-backed militant group exploded almost simultaneously,

Additional explosions linked to electronic devices caused more deaths and injuries a day after pagers used by Hezbollah exploded, wounding thousands.

Two people from Taiwanese companies were questioned as part of a probe into pagers that exploded while being used by Hezbollah operatives in Lebanon, investigators said Friday, as top officials insisted the devices were not from the island.