Israel began bombing Lebanese branches of an association accused of financing the Iran-backed Hezbollah movement, Lebanese state media reported late Sunday, a further escalation of Israel's nearly month-long war against the militants.

Israel's Prime Minister Benjamin Netanyahu on Saturday accused Iran-backed Hezbollah of trying to assassinate him, with the Middle East already on edge after Israel had vowed retaliation for an Iranian missile barrage.

Awaiting Israel's promised retaliation for a missile attack earlier this month, Iran has balanced threats of a fierce response to any Israeli attack with diplomatic efforts to prevent escalation into all-out regional war.

Israel's killing of Hamas leader Yahya Sinwar dealt a huge blow to the Palestinian group, and while it leaves a gaping void at the top of the movement, its militants remain determined to fight.