Israel’s Mossad spy agency planted a small amount of explosives inside 5,000 Taiwan-made pagers ordered by Lebanese group Hezbollah months beforeTuesday’s detonations, a senior Lebanese security source and another source told news agency Reuters. The operation was an unprecedented Hezbollah security breach that saw thousands of pagers detonate across Lebanon, killing nine people and wounding nearly 3,000 others, including the group’s fighters and Iran’s envoy to Beirut. Iran-backed Hezbollah has vowed to retaliate against Israel, whose military declined to comment on the blasts. The plot appea…