Israel’s military has announced the creation of a “Yellow Line” in southern Lebanon, describing it as a ground-level demarcation that separates its operational zone from areas beyond it. The move comes just days after Israel and Lebanon agreed to a 10-day ceasefire following weeks of hostilities involving the Iran-backed Hezbollah.
Referring to the line publicly for the first time, the Israeli military said its troops had encountered individuals approaching from across the boundary.
“Over the past 24 hours, IDF forces operating south of the Yellow Line in southern Lebanon identified terrorists who violated the ceasefire understandings and approached the forces from north of the Yellow Line in a manner that posed an immediate threat,” AFP quoted Israeli forces as saying.
The military said it responded immediately. The IDF added its “forces attacked the terrorists in several areas,” stating that “actions taken in self-defence and to remove immediate threats are not restricted by the ceasefire.”
What is the ‘Yellow Line’?
The “Yellow Line” is not an officially recognised border but a military separation line marking zones of control. According to Israel, it functions as a reference point to monitor movement and identify potential threats.
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A similar line has been used in Gaza since October 10, effectively dividing territory between Israeli-controlled areas and those under Hamas. By applying the same concept in Lebanon, Israel appears to be using an existing operational template along another volatile front.
❌ HEZBOLLAH CEASEFIRE VIOLATION: Since the ceasefire came into effect, IDF soldiers south of the Yellow Line in southern Lebanon identified several incidents in which terrorists violated the ceasefire understandings by approaching from north of the Yellow Line toward IDF…
— Israel Defense Forces (@IDF) April 18, 2026
Strikes reported near the boundary
Later in the day, the Israeli military said it carried out airstrikes near the same zone.
“The IDF eliminated a terrorist cell operating in proximity to IDF soldiers in southern Lebanon, in the area of the forward defence line,” it said.
The statement did not confirm casualty numbers. It further added, “Additionally, the IDF struck an underground shaft in the area south of the forward defence line, as well as Hezbollah terrorists who were identified entering it. A hit was identified.”
Fragile ceasefire, sharp rhetoric
The development comes amid a delicate pause in fighting that began on Thursday after six weeks of conflict marked by Israeli airstrikes and ground operations in southern Lebanon.
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Hezbollah has said it halted operations following the ceasefire but warned it remains ready to respond to any violations. Lebanese President Joseph Aoun has called for dialogue, saying “direct negotiations” with Israel “are crucial," aiming to “consolidate a ceasefire, secure the withdrawal of Israeli forces from the occupied southern territories, recover prisoners and address outstanding border disputes”.
From Washington, Donald Trump said the US had “prohibited” Israel from bombing Lebanon and would work with Beirut to “deal with” Hezbollah.
However, Israeli Prime Minister Benjamin Netanyahu signalled a tougher stance, saying Israel had not “yet finished the job” against Hezbollah and would continue efforts toward the group’s “dismantling”.
Lebanese authorities say the conflict, which began on March 2, has killed nearly 2,300 people and caused widespread damage, especially in southern areas such as Nabatiyeh.
