The White House gave full backing Tuesday to an Israeli army operation to destroy tunnels allegedly built by Hizbullah under the border with Lebanon.

President Donald Trump's national security adviser John Bolton said that "the U.S. strongly supports Israel's efforts to defend its sovereignty."

UNIFIL was informed by the Israeli army this morning that they have started activities south of the Blue Line to look for suspected tunnels, a UNIFIL statement said on Tuesday.

Caretaker Minister of Environment Tarek Khatib leading a Free Patriotic Movement delegation visited the Secretary General of al-Mustaqbal Movement, Ahmad Hariri in Qantari in the aftermaths of the Jahliyeh incident.

“We carry a message from the FPM chief, (caretaker) Foreign Minister Jebran Bassil to al-Mustaqbal Movement and all the parties in the Mountain region and the homeland, that it is not in our ethics to insult fellow political figures in the country,” said Khatib.

Lebanon's Hizbullah, which Israel accused Tuesday of digging cross-border "attack tunnels", has grown considerably as a domestic political player and a regional military power since its foundation three decades ago.

Prime Minister-designate Saad Hariri and Hajj Hussein Khalil, political advisor of Hizbullah chief Hassan Nasrallah, reportedly held talks over Saturday’s Jahliyeh incident and the repercussions as a result, al-Akhbar daily said on Tuesday.

The Saudi Arabian embassy in Lebanon refuted on Tuesday the “claims” made by head of the Tawhid Party, Wiam Wahhab, affirming the Saudi keenness on Lebanon’s “stability and unity.”

Israel's army said Tuesday it had detected Hizbullah tunnels infiltrating its territory from Lebanon and launched an operation to destroy them, a move likely to raise tensions with the Iran-backed group.

Coordination between the Progressive Socialist Party and Hizbullah was not interrupted after the Jahliyeh incident, PSP leader ex-MP Walid Jumblat announced on Monday.

“To comrades and supporters: as usual, there is a series of bizarre and seditious rumors. I clarify that coordination with Hizbullah as going on as usual, despite the divergence in the viewpoints on some issues,” Jumblat tweeted.

Caretaker Interior Minister Nouhad al-Mashnouq on Monday revealed details about his visits to Syria between 2005 and 2011, after ex-minister Wiam Wahhab suggested that Mashnouq had enjoyed warm ties with Syrian officials.

“Aggrieved, exiled and oppressed, I left Lebanon because of my stance on the Syrian intelligence apparatus during the peak of the period when talking to the Syrians was easy, required and a criterion for patriotism,” Mashnouq said in a statement, reminiscing his pre-politics days as a journalist.

A Hizbullah delegation on Monday offered condolences in the Chouf town of Jahliyeh over the death of ex-minister Wiam Wahhab’s bodyguard Mohammed Bou Diab.

Bou Diab died of his wounds after being injured in a confrontation between Wahhab’s supporters and an elite force from the Internal Security Forces Intelligence Branch. The force was seeking to arrest Wahhab or notify him of the need to appear before the Branch for interrogation.