President Joseph Aoun expressed "deep concern" following the latest Israeli ground incursion north of the Litani River and made "direct contact with senior officials in the U.S. administration, as well as with the Lebanese ambassador to Washington, Nada Moawad, with the aim of pressuring Israel and compelling it to establish a ceasefire before any negotiations can begin," media reports said.

In an unprecedented diplomatic move, Lebanon has filed a formal complaint with the U.N. against Iran, accusing Tehran of violating the Vienna Convention on diplomatic relations, interfering in Lebanese sovereign affairs, and embroiling the country in a devastating war against its will, Independent Arabia reported.

Lebanon's Simon Karam and Israel's Yechiel Leiter, both political veterans with entrenched views, will come face to face in Washington for talks Thursday after decades in a state of war.

Lebanon and Israel have no formal ties, but U.S. President Donald Trump is hoping for a historic breakthrough even as Israeli forces remain deployed in south Lebanon to fight Iran-backed Hezbollah.

Israeli strikes targeted Wednesday seven cars, three of them on a major highway linking Beirut to southern Lebanon, killing 8 people, including 2 children.

The attacks on the coastal highway south of Beirut took place in Jiyeh, Barja and Saadiyat. On Saturday, two similar strikes targeted two cars on the same highway, despite a truce reached on April 16.

Health Minister Rakan Nassereddine told a press conference on Tuesday that since the ceasefire, "380 people have been killed and 1,122 wounded". That toll includes 39 women and 22 children.

Nassereddine decried a "systematic, ongoing attack on civilians", and described the ceasefire as "fragile and ineffective".

Hezbollah launched Tuesday a massive drone swarm attack on north Israel, Israeli media said, adding that it is the first time multiple drones target a single target inside Israel.

An Israeli security source described the attack as the most significant drone attack on Israel to date.

Strikes targeted Tuesday afternoon al-Henniyyeh, Kherbet Selem, Qsaybeh, Harees, Tayrdebba, and Ras al-Ain south of Tyre, while Hezbollah claimed drone attacks on a soldier and a Merkava tank in north Israel near the border with Houla.

The Israeli army renewed its warning to four villages in south Lebanon -- Arzoun, Tayrdebba, Bazourieh and al-Hosh.

Amid preparations for the third round of Lebanese-Israeli negotiations in Washington, Prime Minister Nawaf Salam clarified that "at the top of our agenda is solidifying the ceasefire."

Israeli strikes on Lebanon have killed 380 people since a ceasefire in the Israel-Hezbollah war began on April 17, Lebanon's health ministry told AFP on Tuesday.

A ministry official said that "380 people, including 22 children and 39 women, have been killed in strikes on Lebanon since the ceasefire came into effect", out of a total of around 2,900 people killed since the war erupted on March 2.

The Israeli military said on Tuesday its troops had conducted a days-long raid in the area of the Litani river in south Lebanon, where exchanges of fire with Hezbollah persist despite a ceasefire.

In a statement, the military said that over the past week, troops had conducted a "special operation to clear terrorist infrastructure from the Litani area and establish operational control in the area".