A Pakistan-brokered ceasefire between the United States and Iran, announced barely hours earlier, appeared on the verge of collapse on Wednesday evening as Israel launched its heaviest bombardment of Lebanon since the war began, Iran re-closed the Strait of Hormuz, and Tehran's parliament speaker declared further negotiations "unreasonable."
The two-week truce, which followed 41 days of intense fighting between Iran and a US-Israeli coalition, had briefly raised hopes of a diplomatic off-ramp in one of the most devastating regional conflicts in decades. Instead, the first day of the ceasefire degenerated into a cascading series of violations, contradictory statements, and fresh bloodshed — raising the spectre of an immediate return to full-scale hostilities.
The Ceasefire and Its Contradictions
The agreement was announced on Tuesday evening Washington time by President Donald Trump, who described a 10-point Iranian proposal, conveyed through Pakistani Prime Minister Shehbaz Sharif, as a "workable basis on which to negotiate." Under its terms, both sides would suspend hostilities for two weeks, during which Iran committed to allowing coordinated transit through the Strait of Hormuz while negotiations continued.
The ambiguity at the heart of the deal was immediately apparent. Pakistan's prime minister stated explicitly that the ceasefire covered "Lebanon and elsewhere" and was "effective immediately." Iran's Supreme National Security Council published a statement claiming Washington had accepted Tehran's conditions, including the cessation of hostilities on all fronts — specifically naming Hezbollah. The Iranian version of the agreement also referenced continued uranium enrichment and eventual lifting of sanctions.
Within hours, however, Israeli Prime Minister Benjamin Netanyahu issued a statement supporting Trump's decision to suspend strikes against Iran but declaring unequivocally that the truce "does not include Lebanon." White House Press Secretary Karoline Leavitt backed the Israeli position. Vice President JD Vance went further, characterising Tehran's belief that Lebanon was covered as "a reasonable misunderstanding, but neither us nor the Israelis said that was going to be" covered.
Trump himself, asked about the ongoing strikes in Lebanon, reportedly described the situation as "a separate skirmish."
"Operation Eternal Darkness": The Deadliest Day
The gap between words and reality was filled with fire. In what the Israeli military termed "Operation Eternal Darkness," approximately 50 fighter jets struck over 100 Hezbollah targets in under 10 minutes on Wednesday afternoon, hitting Beirut's southern suburbs, the Bekaa Valley, and southern Lebanon in what the IDF called its largest coordinated strike since the current war's inception on 2 March.
The strikes hit densely populated residential and commercial areas of central Beirut without prior warning, including the neighbourhoods of Bir Hassan, Haret Hreik, Chiah, Hay al-Sellom, Tallet al-Khayyat, and Corniche al-Mazraa. Lebanese Civil Defence reported at least 254 dead and 1,165 wounded. Charred bodies were found in vehicles and on pavements at one of Beirut's busiest intersections. Rescue workers used forklifts to clear smouldering rubble. The Lebanese Red Cross deployed 100 ambulances.
Israel's Defence Minister Israel Katz called it "the largest concentrated blow Hezbollah has suffered since Operation Beepers" — a reference to the September 2024 pager-bombing campaign. The IDF stated that "most of the infrastructure that was struck was located within the heart of the civilian population."
Lebanon's Health Minister Rakan Nassereddine called the escalation "very dangerous," noting that ambulances and emergency aid centres had also been targeted. President Joseph Aoun condemned the strikes as "a new massacre." Since Israel expanded its military operations in Lebanon on 2 March, more than 1,500 people have been killed — including at least 130 children — and over 1.2 million displaced, roughly one-fifth of the country's population.
Iran's Response: From Warnings to Re-Closure
Tehran's reaction escalated rapidly through the day. The IRGC Aerospace commander, Brigadier General Seyyed Majid Mousavi, wrote on social media that Iran's forces had "their hands on the trigger" and that any violation would be met with a response "in full power." He later added that "an attack on the proud Hezbollah is an attack on Iran" and that the field was "preparing a heavy response."
In a separate formal statement, the IRGC directly addressed Washington and Tel Aviv, warning: "If the aggressions against dear Lebanon are not immediately stopped, we will fulfil our duty and deliver a regretful response to the evil aggressors in the region."
Foreign Minister Abbas Araghchi framed the crisis as a binary choice for Washington: "The Iran–US Ceasefire terms are clear and explicit: the US must choose, ceasefire or continued war via Israel. It cannot have both." Foreign Ministry spokesman Esmaeil Baqaei described the strikes as "an outrageous and shameful crime" and stated that Lebanese inclusion in the ceasefire had been explicitly committed to by the American side through Pakistani mediation.
President Masoud Pezeshkian, speaking with Pakistani PM Sharif, condemned post-ceasefire attacks on Lavan and Siri islands and vowed that Iran "will respond decisively to any aggression."
The most consequential response, however, came not in rhetoric but in geography. Iranian state media reported that tanker traffic through the Strait of Hormuz — which had been tentatively reopened following the ceasefire announcement, with two vessels transiting on Wednesday morning — was suspended again in direct response to the Lebanon strikes. Bloomberg reported that only three ships were observed leaving the Gulf on Wednesday, against a peacetime average of 135 daily transits. Over 800 vessels remained stranded inside the Gulf, including 426 tankers. The IRGC's judiciary-affiliated Mizan news agency warned ships to use alternative routes due to the possible presence of sea mines.
Qalibaf's Bombshell: Three Violations, Talks "Unreasonable"
Perhaps the most diplomatically significant development came from Parliament Speaker Mohammad Bagher Qalibaf — increasingly identified as Iran's lead negotiator for the planned Islamabad talks. In a statement on X, Qalibaf accused Washington of violating three key clauses of Iran's 10-point proposal before negotiations had even begun.
The first violation, he said, was the failure to uphold the Lebanese ceasefire — a commitment Pakistan's prime minister had "explicitly referred to." The second was the incursion of a drone into Iranian airspace over Fars province, intercepted near the city of Lar, constituting "a clear violation of the clause prohibiting any further violation of Iran airspace." The third was Washington's denial of Iran's right to uranium enrichment, which Qalibaf said was enshrined in the sixth clause of the framework.
"The very 'workable basis on which to negotiate' has been openly and clearly violated, even before the negotiations began," he wrote. "In such situation, a bilateral ceasefire or negotiations is unreasonable."
Reuters reported that both the American delegation, to be led by Vice President JD Vance, and the Iranian delegation under Qalibaf were due to arrive in Islamabad on Thursday. Whether these talks proceed now remains uncertain.
The Hormuz Lever and the Wider Stakes
Iran's ability to control or disrupt the Strait of Hormuz — through which 20 percent of all globally traded oil and natural gas transits in peacetime — has proved its single most potent strategic lever throughout the conflict. The closure sent Brent crude above $126 per barrel at its peak, caused what analysts described as the largest disruption to global energy supply since the 1970s, and affected markets from aluminium to fertiliser to helium.
The ceasefire had prompted an immediate market rally, with oil dropping below $100 and stock markets in Asia, Europe, and the Gulf surging — Dubai's index jumped 8.5 percent, its largest intraday gain since 2014. The re-closure threatens to reverse those gains and intensify the economic pressure that had driven all parties toward the table.
A novel element of the emerging deal — the formalisation of Iranian (and Omani) fees on strait transit, with revenues earmarked for reconstruction — had already drawn alarm from Gulf states and legal scholars. A Just Security analysis published on Wednesday argued that Iran's assertion of sovereign authority over the waterway is inconsistent with the freedom of navigation guaranteed under the UN Convention on the Law of the Sea.
## Divergent Narratives of Victory
Adding to the volatility, both sides emerged from the ceasefire announcement claiming victory in starkly incompatible terms. US Defence Secretary Pete Hegseth said American and Israeli forces had achieved a "capital V military victory," asserting that Iran's military no longer posed a significant threat. Trump had earlier claimed Iran had lost its navy, air force, air detection, and radar.
Iran's armed forces, by contrast, claimed to have "forced the criminal America to accept its 10-point plan" — including continued enrichment, Iranian control over Hormuz, lifting of all sanctions, withdrawal of US forces, and compensation payments. Iranian state media celebrated a "historic victory" after 100 waves of retaliatory strikes under Operation True Promise 4.
The factual gap between these narratives is itself a driver of instability: each side's domestic audience has been told a version of events that makes further concessions politically costly.
What Comes Next
As of Wednesday evening, the situation remains acutely volatile. Reports from Iran International indicated sounds of explosions, air defence activity, and fighter jet overflights in Tehran and the surrounding Alborz province on Wednesday night — suggesting the ceasefire's hold on even the US-Iran axis is tenuous.
The Lebanon front has become the decisive fault line. Iran has repeatedly stated that any aggression against Hezbollah is aggression against Iran. Hezbollah's Ibrahim Al Moussawi warned of a response from Iran and its allies if Israel "does not adhere to a ceasefire." Yet Israel has signalled no intention of halting operations, with the IDF maintaining ground forces up to six miles inside Lebanese territory and Katz framing the offensive as a continuation of a campaign to disarm Hezbollah.
Egypt, which helped mediate the ceasefire alongside Pakistan, accused Israel of a "premeditated" attempt to undermine the truce. The UN High Commissioner for Human Rights called the strikes "horrific" and urged the international community to act. The UN Security Council convened an emergency session on the killing of peacekeepers in Lebanon.
The Islamabad talks, if they proceed, will be shadowed by a fundamental disagreement over what was actually agreed — and by the reality that the most destructive day in Lebanon since the war began occurred under the nominal banner of a ceasefire.