"We are in continuous contact with our American friends".
"We have launched Operation Northern Shield to expose and thwart cross-border attack tunnels dug by Hizbullah organisation from Lebanon into Israel", Conricus told journalists. Reinforcements were sent to the border, and later Tuesday, the military said the first tunnel had been uncovered, running from a private home in the Lebanese village of Kfar Kela, and would be demolished.
The last major conflict between Israel and Hezbollah was the 2006 Second Lebanon War.
The tunnels are concentrated in the area around Metula, a small Israeli town of around 1,000 people nestled against the border with Lebanon.
The announcement of the operation comes after Israeli Prime Minister Benjamin Netanyahu met US Secretary of State Mike Pompeo in Brussels on Monday night.
Col Conricus said the tunnels were part of a plan by Hezbollah to "conquer the Galilee" region of Israel in a future conflict.
According to two senior regional intelligence sources, the area where the incident is said to have occurred is where Hezbollah has its communications and logistics hub for southern Syria near the Israeli border.
An Israeli military digger works on the Lebanese Israeli border next to a wall that was built by Israel in the southern village of Kafr Kila Lebanon
Israel's security cabinet was set to convene to discuss the situation in the north at the defense ministry's headquarters in Tel Aviv at 7:30 p.m. local time, as the IDF said it was preparing for a "protracted" operation at the Lebanese border.
He said the Palestinian Islamist movement Hamas, which controls Gaza, had shared tunnel-digging knowledge with Hezbollah.
Its Arabic media spokesman posted a message on Twitter warning the Lebanese army and Hezbollah to stay away, saying: "Your lives are in danger, you have been warned".
The Lebanese military issued a statement saying the situation on the Lebanese side of the border is "calm and stable", adding that army units deployed in the area were carrying on with their usual missions in coordination with United Nations peacekeepers.
The premier had said that elections now would be "irresponsible" due to the undefined security threats.
Earlier this week the Israel Police recommended indicting Netanyahu on corruption charges, including bribery and breach of trust.
Israel appears increasingly concerned that Iran is attempting to transfer some of its military influence from Syria, where Russian Federation is the government's top ally, to Lebanon.
There has been increased attention in Israel in recent days over Israeli officials' concerns regarding Iranian activity in Lebanon. Israel has generally refrained from engaging in Syria's civil war, though it has carried out scores of airstrikes against what Israel says were Iranian shipments of advanced weapons bound for Hezbollah.
Russian Federation subsequently upgraded Syrian air defences with the delivery of the advanced S-300 system, which Damascus had said last month would make Israel "think carefully" before carrying out further air raids.
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