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,

Some details of how the attacks unfolded are still a mystery. But initial imagery of the attacks on Tuesday and the explosive devices offers clues.

Watch a view of Israel’s border with Lebanon on Wednesday 18 September after Hezbollahpager explosions killed nine and injured thousands. Israel’s Mossad spy agency planted explosives inside 5,000 pagers imported by the group months before Tuesday’s detonations,