The fragile two-week ceasefire between the United States and Iran, mediated by Pakistan just days ago, is showing serious cracks as disputes over Lebanon's inclusion threaten to unravel the diplomatic breakthrough that ended the most dangerous international crisis since the Cold War.
Iran has declared parts of the crucial Strait of Hormuz "unsafe for shipping" in response to Israeli airstrikes on Lebanon that killed 254 people in the deadliest single day of violence since the conflict began. The Iranian Revolutionary Guard warned that vessels attempting passage without permission "will be targeted and destroyed," raising fears of a return to the energy crisis that saw oil prices soar past $119 per barrel.
Pakistan's Historic Mediation Under Strain
The breakthrough ceasefire, dubbed the "Islamabad Accord," was achieved through intensive diplomacy by Pakistani Prime Minister Shehbaz Sharif and Field Marshal Asim Munir, who maintained round-the-clock contact with U.S. Vice President JD Vance and Iranian officials through a "message relay system." The agreement came just 88 minutes before President Trump's deadline, when he had threatened that Iran's "whole civilization will die tonight."
However, a critical loophole has emerged: while the U.S. and Iran agreed to the ceasefire, there was no consensus on whether it covered Lebanon. Israeli Prime Minister Benjamin Netanyahu has explicitly stated that Lebanon is not part of the agreement, allowing continued operations against Hezbollah positions.
"I think there was a logical misunderstanding. I think the Iranians thought that the ceasefire applied to Lebanon, but it simply doesn't. We never promised that. We never indicated that would be the case."
— JD Vance, U.S. Vice President
Deadliest Day in Lebanon
The dispute came to a head Wednesday when Israel launched what it described as "the largest coordinated strike across Lebanon" since the conflict began. Over 100 Hezbollah sites were targeted across Beirut, the Bekaa Valley, and southern Lebanon within ten minutes, killing at least 254 people according to Lebanese Civil Defense, with varying reports putting the toll between 182-254 dead.
The strikes hit densely populated neighborhoods in Beirut, with the highest casualty count reported in the capital where 91 people were killed. The bombardment has displaced over 1.2 million Lebanese—nearly 25% of the population—with thousands forced to sleep on Beirut's streets as emergency shelters reach capacity.
Particularly concerning has been the systematic targeting of medical personnel. Since March 2, 26 paramedics have been killed and 51 wounded, including 12 medical workers killed in an attack on the Burj Qalaouiyah healthcare center. Israeli military spokesman Avichai Adraee has threatened strikes against ambulances claiming Hezbollah military use, allegations categorically denied by the group.
Iran's Strategic Response
Iranian Foreign Minister Abbas Araghchi stated that the terms of the ceasefire are "clear," emphasizing that Washington must "choose between ceasefire or war via Israel." Iran has informed mediators it will limit passage through the Strait of Hormuz to just 10 ships daily, with over 400 tankers currently waiting.
The Islamic Revolutionary Guard Corps published navigation charts warning commercial vessels to avoid sea mines in the main traffic zone of the strait, which handles 40% of the world's seaborne oil transit. This marks the second time Iran has threatened to close this critical waterway during the crisis.
Iran's Parliament Speaker Mohammad Bagher Ghalibaf declared that negotiations would be "unreasonable" if Israel's violations continue, accusing Washington of breaching the framework before formal talks even begin.
Global Stakes and Economic Impact
The original ceasefire had provided immediate relief to global markets, with oil prices crashing nearly 20% from their peak of $119.50 per barrel. Asian stock markets surged, airlines began planning to resume Middle East routes, and the International Energy Agency started reducing its record 400-million-barrel strategic reserve release.
However, the renewed tensions have caused oil prices to tick upward again, with Brent crude rising as markets price in the risk of another supply disruption. The crisis has already caused the cancellation of over 18,000 flights worldwide and forced the closure of Dubai International Airport, the world's busiest.
International Diplomatic Efforts
French President Emmanuel Macron has called on both U.S. President Trump and Iranian President Masoud Pezeshkian to ensure Lebanon is included in any ceasefire agreement. Similarly, Australian Prime Minister Anthony Albanese has urged that Lebanon be covered by the truce following the devastating strikes.
Lebanese Prime Minister Nawaf Salam has declared a national day of mourning and stressed his commitment to hold talks with Arab leaders and international officials to stop the Israeli attacks. Turkey's President Erdogan has warned against "possible provocations and sabotage" that could undermine the ceasefire process.
The Collapse of Previous Agreements
The current crisis stems from the complete breakdown of the November 2024 U.S.-French brokered ceasefire between Israel and Hezbollah, which had held for over a year. The agreement collapsed in March 2026 when Hezbollah faced an "impossible choice" between maintaining the ceasefire and responding to Iranian pressure for retaliation following the death of Iran's Supreme Leader Ali Khamenei.
Hezbollah's decision to choose "Iranian solidarity over Lebanese sovereignty" pulled Lebanon into the broader regional conflict. The organization, estimated to have 20,000 fighters, has conducted over 40 operations targeting northern Israeli military sites, declaring "direct confrontations" with Israeli forces in southern Lebanon.
Scheduled Talks in Islamabad
Despite the growing tensions, formal negotiations between the U.S. and Iran are still scheduled to begin Friday in Islamabad. This would represent the most direct diplomatic engagement between the two countries in decades, with VP Vance potentially leading the American delegation alongside special envoys Steve Witkoff and Jared Kushner.
The talks are based on Iran's 10-point proposal, which addresses Hormuz protocols, sanctions relief, regional conflicts, and security guarantees. However, Iran has indicated it may not attend unless a comprehensive ceasefire is enforced on all fronts.
A Template-Setting Crisis
U.N. Secretary-General António Guterres has called the situation "the greatest test of multilateral cooperation in the modern era." The fragility of the current arrangement demonstrates the challenges of maintaining negotiated agreements when fundamental security concerns remain unaddressed.
President Trump has warned that U.S. military assets will remain deployed around Iran and threatened that American forces will start "shooting" again if Tehran fails to comply with the agreement. The President posted on Truth Social: "All U.S. Ships, Aircraft, and Military Personnel, with additional Ammunition, Weaponry... will remain in place in, and around, Iran, until such time as the REAL AGREEMENT reached is fully complied with."
"If for any reason it is not, which is highly unlikely, then the 'Shootin' Starts,' bigger, and better, and stronger than anyone has ever seen before."
— Donald Trump, U.S. President
The current crisis represents a critical juncture in 21st-century diplomacy, testing whether innovative multilateral mediation can preserve peace when traditional mechanisms fail. The success or failure of containing this escalation will likely influence international approaches to crisis management for decades to come.
As Pakistan continues its historic mediation efforts, the world watches to see whether diplomatic solutions can prevail in what UN officials have called the most dangerous international crisis since the Cold War. The coming days will determine whether the breakthrough ceasefire can evolve into lasting peace or collapse into renewed conflict with global consequences.