A massive Israeli military operation in southern Lebanon has brought the long-running battle over Hezbollah's underground infrastructure into sharp focus after a huge explosion at the strategic Ali al-Taher ridge triggered tremors across the region.

Israel said it had destroyed a major Hezbollah tunnel network beneath the ridge, claiming the underground complex stretched for more than two kilometres and contained rockets, missiles, drones, anti-tank weapons, mines and other military equipment. The blast was powerful enough to be registered as a 4.1-magnitude earthquake, according to the US Geological Survey.

The operation marks a significant escalation in Israel's campaign to dismantle Hezbollah's military infrastructure in southern Lebanon, even as a fragile ceasefire and diplomatic efforts continue to struggle to contain renewed violence.

Massive Hezbollah tunnel network destroyed

The underground complex was located beneath the Ali al-Taher ridge in southern Lebanon, an elevated and strategically important area that overlooks large parts of the surrounding region.

Israeli officials described the tunnel system as a major Hezbollah military hub that had been developed over decades. According to the Israeli military, the network extended for more than two kilometres and included weapons storage areas, operational facilities and a command centre associated with Hezbollah's Badr unit.

The military said troops discovered dozens of Iranian-made rockets, missiles and unmanned aerial vehicles, along with machine guns, anti-tank missiles and hundreds of mines and explosive devices inside the underground infrastructure.

The complex was also reportedly equipped with living quarters, allowing Hezbollah fighters to remain underground for extended periods while operating from the ridge.

Israel has portrayed the facility as a critical component of Hezbollah's military architecture in southern Lebanon, arguing that its destruction prevents the group from rebuilding an offensive presence close to Israel's northern border.

Israeli Prime Minister Benjamin Netanyahu and Defence Minister Israel Katz said the operation completed what they described as Israel's operational control of the Ali al-Taher ridge, both above and below ground.

Explosion causes 4.1-magnitude tremor

The scale of the demolition became clear when a huge explosion shook the area on Thursday evening.

Lebanese authorities reported a powerful blast on the Ali al-Taher ridge, while residents and journalists in southern Lebanon reported hearing an enormous rumble. The resulting ground movement was subsequently recorded as a 4.1-magnitude seismic event.

The tremor added an extraordinary dimension to an operation that was already significant because of the size of the underground complex being destroyed.

The Israeli military said a large quantity of explosives had been used to demolish the tunnel system. The destruction was carried out after Israeli forces had already entered the area and cleared it of Hezbollah fighters.

Israeli officials said some militants were killed during earlier fighting, while others fled the complex. The military had announced the capture and clearing of the ridge approximately a week before the tunnels were finally demolished.

The sequence suggests that the tunnel network was not simply attacked from the air. Israeli forces first sought to establish control over the area and clear the underground positions before carrying out the large-scale demolition.

Why Ali al-Taher matters

The Ali al-Taher ridge is more than just another military position in southern Lebanon.

Its elevated terrain gives forces operating there a strategic view across a broad stretch of southern Lebanon. The area has consequently become one of the most contested locations in the continuing confrontation between Israel and Hezbollah.

Israel has said the underground infrastructure was intended to support attacks and surveillance directed toward northern Israeli communities, including areas around Metula and Kiryat Shmona.

The tunnel system was also described as a command and logistics centre for Hezbollah's Badr unit, making its destruction potentially important beyond the physical damage caused to the tunnels themselves.

The Israeli military has argued that the infrastructure was built over a period of more than two decades with Iranian funding and planning. The claim fits into Israel's broader argument that Hezbollah has constructed an extensive military network across southern Lebanon, including weapons depots, tunnels and command positions.

A ceasefire that has failed to end the fighting

The latest operation comes despite diplomatic efforts aimed at preventing another full-scale Israel-Hezbollah war.

A US-backed framework reached in June was intended to reduce hostilities and establish conditions for Israeli withdrawal from southern Lebanon and the Lebanese state's assumption of greater control over the region.

But implementation has remained deeply contested.

Israel has insisted that Hezbollah must be prevented from rebuilding its military infrastructure and has continued operations in parts of southern Lebanon. Hezbollah, meanwhile, has resisted demands that would require it to surrender its weapons or abandon strategically important positions.

The dispute over the Ali al-Taher ridge became a particularly sensitive part of those negotiations. The United States had proposed that the Lebanese army take control of the area, but Hezbollah reportedly rejected the proposal.

Instead, Israeli forces have continued to maintain a presence in what Israel describes as a security zone in southern Lebanon.

The result is a ceasefire in name but a conflict environment that remains highly unstable on the ground.

Southern Lebanon residents watch homes being destroyed

While the tunnel operation was unfolding, the human impact of the continuing military campaign was visible in nearby communities.

Residents displaced from villages in southern Lebanon have described watching Israeli drones drop explosives on their former homes and other structures.

In areas such as Mansouri, residents who have been forced to leave their villages have gathered at a distance to watch demolition operations. Homes, public buildings and other structures have been systematically damaged or destroyed in areas under Israeli control.

For displaced residents, the destruction represents more than the removal of military infrastructure. It means the loss of homes, livelihoods and the possibility of returning to normal life.

Some residents have also expressed frustration with the Lebanese government, accusing authorities of failing to protect communities caught between Hezbollah's military presence and Israeli operations.

The continuing demolitions have complicated efforts to encourage displaced residents to return home. Although the June truce allowed some people to go back, hundreds of thousands remain displaced amid continued insecurity and military activity in the south.

Rising fears of another escalation

The destruction of the Ali al-Taher tunnels is likely to have consequences beyond the immediate battlefield.

The operation demonstrates that Israel remains willing to conduct major military actions in southern Lebanon despite diplomatic efforts to stabilize the border. It also sends a clear warning that Israel intends to prevent Hezbollah from restoring the infrastructure it built over decades.

At the same time, continued Israeli operations risk creating another cycle of retaliation.

Recent violence has already included Hezbollah drone attacks and Israeli strikes across southern Lebanon. Earlier this month, Israeli strikes on Kfar Rumman killed at least 12 people, including two children, according to Lebanese authorities, further raising fears that the ceasefire could unravel.

The destruction of the tunnel network could therefore be viewed in two very different ways.

For Israel, it represents the dismantling of a major threat and an attempt to establish a more secure buffer zone along its northern frontier.

For many Lebanese residents, however, the continued military presence and destruction of communities raise concerns that the south is becoming trapped in a prolonged cycle of occupation, displacement and retaliation.

What happens next?

The immediate question is whether the destruction of the Ali al-Taher network will strengthen diplomatic efforts or push the region toward another escalation.

US-mediated talks between Israel and Lebanon are expected to continue, with further discussions planned in Rome. The central issues remain the same: Israeli withdrawal, Hezbollah's weapons, Lebanese state control over the south and guarantees that the area will not again become a launchpad for attacks.

The destruction of one of Hezbollah's major underground complexes may give Israel additional leverage in those negotiations. But it does not resolve the political dispute at the heart of the conflict.

For residents of southern Lebanon, the uncertainty is more immediate. Many remain displaced, while Israeli forces continue operating in parts of the region and Hezbollah retains its military capabilities.

The 4.1-magnitude tremor triggered by the tunnel demolition may have lasted only moments, but the political and humanitarian aftershocks could last far longer.

The central challenge now is whether the destruction of the tunnels becomes a step toward a more secure southern Lebanon—or another milestone in a conflict that has repeatedly shown how quickly a fragile calm can collapse.

With input from agencies

Image Source: Multiple agencies

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