A U.S. envoy has arrived in Beirut to meet with Lebanese officials about a possible cease-fire in the Israel-Hezbollah war.

Amos Hochstein, a senior advisor to United States President Joe Biden, arrived Tuesday, a day after Hezbollah reportedly gave a positive response to a U.S. draft proposal to end the war, which has been ongoing for more than 13 months.

G20 leaders called for "comprehensive" ceasefires in both Gaza and Lebanon in a joint statement at a summit in Brazil on Monday.

The leaders of the world's biggest economies called for a U.S.-proposed permanent ceasefire in Gaza in return for the release of all hostages, as well as a Lebanon ceasefire "that enables citizens to return safely to their homes on both sides of the Blue Line."

Hezbollah launched explosive-laden drones at military targets in Tel Aviv, as Israeli rescuers said five people were injured by rocket fire in the city suburbs.

Hezbollah fighters launched an "air attack with a squadron of qualitative attack drones on sensitive military points - which will be announced later - in the city of Tel Aviv," the group said in a statement.

U.S. mediator Amos Hochstein traveled to Beirut on Monday in an effort to finalize a ceasefire agreement that would end the war between Israel and Hezbollah, U.S. officials told U.S. news portal Axios.

An Israeli airstrike targeted the main water facility in the southern port city of Tyre, killing two local officials and injuring two others, further compounding southern Lebanon’s worsening water crisis, Lebanon’s state media said.

The attack severely damaged the facility, prompting the Tyre Municipality to urge residents to ration water use until repairs can be made, the National News Agency said.

Israeli Prime Minister Benjamin Netanyahu said Monday that Israel will continue to operate militarily against Hezbollah even if a ceasefire deal is reached in Lebanon.

"The most important thing is not (the deal that) will be laid on paper... We will be forced to ensure our security in the north (of Israel) and to systematically carry out operations against Hezbollah's attacks... even after a ceasefire", to keep the group from rebuilding its forces, Netanyahu told the Israeli parliament.

The Lebanese government has largely endorsed U.S. truce proposal to end the Israel-Hezbollah war and was preparing final comments before sending a response to Washington, a Lebanese official told AFP on Monday.

Since September 23, Israel has intensified its air campaign in Lebanon, later sending in ground troops, nearly a year into limited exchanges of fire initiated by Hezbollah in support of Palestinian ally Hamas after its October 7, 2023 attack sparked the Gaza war.

Minutes after an Israeli strike killed at least four in central Beirut, caretaker Prime Minister Najib Mikati said in a post on X, “All countries and decision-makers are required to end the bloody and destructive Israeli aggression on Lebanon and implement international resolutions, most notably Resolution 1701.”

U.N. Security Council Resolution 1701, adopted in 2006, was intended to create a buffer zone in southern Lebanon and end hostilities between Israel and Hezbollah. However, the resolution’s full implementation has faced challenges from both sides.

A Lebanese security official told AFP that an Israeli strike hit a central neighborhood of the capital Beirut on Monday, the third such attack in the last 24 hours.

"The Israeli enemy strike on Zoqaq al-Blat in Beirut killed five people and injured 18," the ministry said in a statement, giving a preliminary toll.

Dozens of heritage sites in Lebanon were granted "provisional enhanced protection" by UNESCO Monday, the U.N. cultural body said, offering a higher level of legal shielding as Israel heavily bombed Lebanon.

The 34 cultural sites affected "now benefit from the highest level of immunity against attack and use for military purposes," UNESCO said in a statement, adding that "non-compliance with these clauses would constitute 'serious violations' of the 1954 Hague Convention and... potential grounds for prosecution".