The military said the tunnels were not yet operational, but posed “an imminent threat”. 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.
One tunnel originated under a house in the Lebanese border village of Kfar Kila and crossed the frontier near Israel’s northernmost town, Metula, the Israeli military said.
There was no immediate comment from Hezbollah. The Lebanese army said the situation was calm on its side of the border, as did U.N. peacekeepers operating there. It said the military was “fully prepared to face any emergency”.
Prime Minister Benjamin Netanyahu said late on Tuesday the tunnels were a grave violation of Israeli sovereignty.
“Hezbollah’s intention was to insert terrorists into our territory through these tunnels,” he said.