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.

The strike on power stations and a seaport, which killed four people, was the second known time that Israel has retaliated against the militant group’s attacks by striking in Yemen.

Israel said it bombed Houthi targets in Yemen on Sunday and mounted further airstrikes in Lebanon, expanding its confrontation with Iran's allies in the region two days after killing the Hezbollah leader Sayyed Hassan Nasrallah.

Hezbollah on Sunday confirmed the death of high-ranking official Nabil Kaouk in an Israeli airstrike, a day after the Lebanese militant group acknowledged the killings of multiple commanders, including longtime leader Hassan Nasrallah.

The IDF launched dozens more airstrikes in Lebanon and the Israeli Air Force launched a large-scale operation striking Iranian-backed Houthi rebels in Yemen.

Fifty-five people were killed and 156 others wounded in Israeli airstrikes across Lebanon on Tuesday, Lebanon's Ministry of Health said. The strikes hit across the country, including Beirut's southern suburbs,

Lebanon's health ministry on Sunday said Israeli strikes killed nearly 60 more people, after Israel's military said it kept up its bombardment of Hezbollah targets there and also struck Yemen.