In a speech in Beirut on Wednesday, Hezbollah leader Hassan Nasrallah vowed that his powerful Iran-backed Shi'ite militia "cannot be silent" following the killing of Hamas deputy Saleh al-Arouri on Tuesday.
Nasrallah said his heavily armed forces would fight to the finish if Israel chose to extend the war to Lebanon, but he made no concrete threats to act against Israel in support of Hamas, Hezbollah's ally also backed by Iran.
Israel neither confirmed nor denied assassinating Arouri but has promised to annihilate Hamas, which rules Gaza, following the group's Oct. 7 cross-border assault in which Israel says 1,200 people were killed and some 240 abducted.
Israeli military spokesperson, Rear Admiral Daniel Hagari, when asked what Israel was doing to prepare for a potential Hezbollah response, told a reporter: "I won't respond to what you just mentioned. We are focused on the fight against Hamas."
White House spokesperson John Kirby, asked about Nasrallah's speech, told reporters: "We haven't seen Hezbollah jump in with both feet to come to Hamas' aid and assistance."
Arouri's killing was a further sign of the potential the nearly three-month-old war might spread well beyond Gaza, drawing in the Israeli-occupied West Bank, Hezbollah forces on the Lebanon-Israel border and Red Sea shipping lanes.
Arouri, 57, who lived in Beirut, was the first senior Hamas political leader to be assassinated outside Palestinian territories since Israel began its offensive against the Palestinian Islamist group following the Oct. 7 assault.
Hezbollah has been embroiled in nearly daily exchanges of shelling with Israel across Lebanon's southern border since the Gaza war began. On Wednesday, a local Hezbollah official and three other members were killed in an Israeli strike on southern Lebanon, two security sources told Reuters.
More than 120 Hezbollah fighters and two dozen civilians have been killed on Lebanese territory, as well as at least nine Israeli soldiers in Israel.
Nasrallah said there would be "no ceilings" and "no rules" to Hezbollah's fighting if Israel launched full war on Lebanon.
He said Hamas' lightning incursion on Oct. 7 dealt a severe and deliberate blow to a process of normalisation between Israel and various U.S.-backed Arab governments unfolding since 2020.
Arouri's death removes a big name from Israel's most-wanted list of top Islamist foes, and could drive Hamas' exiled leaders deeper into hiding, hampering efforts to negotiate further Gaza ceasefires and hostage releases.
Israel had long accused him of orchestrating attacks on its citizens. But a Hamas official said he was also "at the heart of negotiations" conducted by Qatar and Egypt over the outcome of the Gaza war and the release of Hamas-held Israeli hostages.
Nasrallah spoke to commemorate four years since the killing of Iranian Revolutionary Guards top commander Qassem Soleimani in a U.S. drone strike in Iraq.
Two explosions on Wednesday during a memorial ceremony at a cemetery in southeastern Iran where Soleimani is buried killed nearly 100 people, at a time of high tension between arch-enemies Iran and Israel.
REFUGEE CAMP UNDER FIRE
Israeli forces meanwhile kept up their aerial and ground blitz against Hamas militants in Gaza.
The total recorded Palestinian death toll from Israel's offensive had reached 22,313 by Wednesday - almost 1% of its 2.3 million population, the Gaza health ministry said.
Israeli bombardments have flattened much of the densely populated enclave, wreaking a humanitarian disaster. Most Gazans have been left homeless, crammed into shrinking areas in hope of rudimentary shelter, with food shortages threatening famine.
In its daily briefing on Wednesday, the Israeli military said "intensive battles" with militants continued in the main southern Gaza city of Khan Younis. Previously, it said it was trying to flush out Hamas leaders in the area.
Israeli planes dropped leaflets on Al-Nusseirat ordering people to leave seven districts.
"You are in a dangerous combat area. The IDF is operating heavily in your area of residence. For your safety the IDF urges you to immediately evacuate this area," the leaflets said, referring to the Israel Defence Forces.
Israeli warplanes and tanks also stepped up attacks on the Al-Bureij refugee camp in central Gaza. Residents said tanks that advanced from the east and north besieged two schools and soldiers took prisoner several people sheltering inside. They also said they were worried about rooftop snipers.
In Rafah near south Gaza's border with Egypt, medics said an Israeli missile strike on a house killed three people. The Gaza health ministry also said an Israeli airstrike killed and wounded dozens in north Gaza's Jabalia refugee camp.
The Israeli military says it tries to avoid harm to civilians and blames Hamas for embedding fighters within residential areas, a charge the group denies.
The Israeli military said the number of its soldiers killed since its first ground incursion on Oct. 20 had reached 177.
(Reporting by Mohammad Azakir in Beirut, Nidal al-Mughrabi in Cairo, Arafat Barbakh in Gaza, Maayan Lubell at the Israel-Gaza border, Dan Williams and Emily Rose in Jerusalem and Trevor Hunnicutt in Washington; Writing by Howard Goller; Editing by David Gregorio)
By Mohammad Azakir, Nidal al-Mughrabi and Arafat Barbakh
