The Iran-backed group, whose leader Israel killed in an air strike on Friday, said its fighters launched a “rocket salvo” at Safed and a smaller location “in defence of Lebanon and its people and in response” to Israeli attacks on cities, villages and civilians.

Israel struck power plants and a sea port in Yemen Sunday as the Israeli military continued an air campaign against Hezbollah in Lebanon.

The escalation of violence between Israel and its Iran-backed proxies across the Middle East threatened to bring the combatants closer to a regional war.