Around 100 Israeli war jets struck Hezbollah's premises in southern Lebanon on Sunday, destroying thousands of the militant outfit's rocket launcher barrels.
Tel Aviv described the strike as pre-emptive, saying the attack was aimed at thwarting a planned Hezbollah offensive in the north of Israel.
The Iran-backed group claimed it fired 320 rockets and drones at Israel's 11 military installations.
Israeli Prime Minister Benjamin Netanyahu said his government was determined to do everything possible to defend the country.
Sunday's hostilities exacerbated an already delicate situation in the restive Middle East, which is reeling under the Israel-Hamas war in Gaza.