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Tensions between the United States and Iran have spiked dramatically following a violent naval confrontation near the Strait of Hormuz, throwing a fragile two-week ceasefire into jeopardy and casting deep uncertainty over plans for a new round of diplomatic negotiations set to kick off this week. The escalation, which unfolded over the weekend, has sent global oil markets climbing and raised fears that the two nations will return to open conflict that has already claimed thousands of lives.

On Sunday, US President Donald Trump confirmed that a US Navy guided-missile destroyer operating in the Gulf of Oman intercepted the Iranian cargo vessel *Touska*, damaging the ship’s engine room before US Marines seized control of the craft. The operation marks the first publicly acknowledged interception of an Iranian commercial ship since Washington imposed a naval blockade on Iranian ports just one week ago.

Iran quickly condemned the seizure as an act of “armed piracy” and launched immediate retaliation, deploying drones to strike US military vessels in the region, according to recent official statements. The clash comes just 48 hours before the existing ceasefire, which has held for two weeks, is scheduled to expire on Wednesday.

In the wake of the confrontation, Iranian Foreign Ministry spokesman Esmail Baghaei announced Monday that Tehran has no immediate plans to participate in new talks with Washington. Though he stopped short of closing the door on future diplomacy entirely, Baghaei harshly criticized the US for violating the terms of the existing truce, pointing to the cargo ship seizure, the ongoing naval blockade, and repeated delays in implementing a parallel ceasefire in Lebanon as clear proof that Washington is not serious about diplomatic progress.

The incident is not the only factor derailing negotiations. Ahead of the Hormuz clash, Trump had announced that US negotiators, led by Vice-President JD Vance, planned to travel to Islamabad, Pakistan—host of the first, inconclusive round of talks—on Monday. Just days earlier, Trump issued a stark threat: if Iran rejected US negotiating terms, the US would destroy every bridge and power plant across Iranian territory. Iran responded with its own vow to retaliate against power stations and desalination plants in Gulf nations that host US military bases if any of Iran’s civilian infrastructure comes under attack.

Despite the recent escalation, there remains mixed messaging from Tehran over the future of talks. Ebrahim Azizi, a prominent member of the Iranian Parliament, told Al Jazeera Monday that Iran is still willing to proceed with negotiations, but has set non-negotiable red lines that Washington must respect. Any final decision to send an Iranian delegation to Islamabad, Azizi added, is contingent on Washington delivering clear, positive signals that it is prepared to respect Iran’s core demands.

The breakdown in trust has already had tangible global economic impacts. In early trading on Monday, international benchmark Brent crude climbed to roughly $95 per barrel, a more than 30% increase from the price recorded when the current round of US-Iran fighting began. Iranian First Vice-President Mohammad Reza Aref emphasized the stakes of the standoff in a social media post Monday, noting that “The security of the Strait of Hormuz is not free. The choice is clear: Either a free oil market for all, or the risk of significant costs for everyone.” Aref added that stable global fuel prices can only be secured through a permanent, guaranteed end to all economic and military pressure on Iran and its regional allies.

Regional mediators led by Pakistan, which has taken on the role of host for the talks, have ramped up diplomatic efforts to de-escalate tensions and get negotiations back on track. On Sunday, Pakistani Prime Minister Shehbaz Sharif held a 45-minute phone call with Iranian President Masoud Pezeshkian, updating the Iranian leader on recent consultations with leaders from Saudi Arabia, Qatar, and Turkiye. Sharif stressed that sustained regional diplomacy is critical to building consensus for a lasting peace between Washington and Tehran. In preparation for potential talks, Pakistani authorities have placed the capital city of Islamabad on high security alert, deploying nearly 20,000 personnel from police, paramilitary forces, and the regular army to secure the venue and surrounding areas, according to unnamed police sources.

Beyond the immediate standoff over the Strait of Hormuz and the naval blockade, the long-disputed Iranian nuclear program remains a core point of contention between the two sides. Last Friday, Trump said the US was prepared to reach a deal with Iran to remove Tehran’s enriched uranium stockpile. CNN, citing anonymous informed sources, reported that Washington is offering to unfreeze $20 billion in Iranian assets held abroad in exchange for Tehran handing over its entire enriched uranium stockpile. But Iranian Deputy Foreign Minister Saeed Khatibzadeh has already rejected the proposal outright, calling it “impossible”.

Foreign policy analysts warn that a quick, comprehensive resolution to the decades-long standoff is out of reach, even if talks do resume. Alex Vatanka, a senior fellow at the Middle East Institute, noted that military action cannot secure open navigation through the Strait of Hormuz, nor can it resolve the US’ concerns over Iran’s nuclear program. “The idea of a grand bargain in the short term is impossible to achieve,” Vatanka told Al Jazeera. “The best you can do is some kind of agreement of a basic framework. And then you have to go and quickly build on it. It will take at least months, if not years.”

The current impasse threatens to push the two countries back into full-scale conflict, which has already killed at least 3,300 people in Iran and 13 US service members, while deepening a global energy crisis.

A fresh expose published in Israeli newspaper Haaretz on Sunday has revealed that the Israeli military has continued the systematic demolition of civilian buildings across southern Lebanon, even after a 10-day ceasefire agreement halted formal open hostilities last Thursday. The ceasefire, which brought a temporary end to months of deadly large-scale conflict, has not put a stop to state-backed destruction of residential and public infrastructure in border-area villages, according to senior Israeli army commanders who spoke to the outlet on condition of anonymity.

Per the sources, the demolition operation is being carried out by paid Israeli civilian contractors deployed with heavy civilian engineering equipment, including dozens of excavators. Contractors are compensated either through a fixed daily wage or via performance-based payments tied to the number of structures destroyed and the total scope of the work. Multiple sources confirm that some of these contractors have prior experience carrying out similar demolition work in the Gaza Strip, with one witness noting that roughly 20 excavators were operating simultaneously in a single southern Lebanese village alone.

The operation targets schools, residential homes and other civilian sites as part of an official Israeli policy framed as “cleaning up the area,” a tactic directly modeled after widespread destruction campaigns Israel carried out in Gaza starting in October 2023. All destruction is occurring south of the so-called “yellow line” — a boundary unilaterally drawn by Israel roughly 20 kilometers south of the Litani River — which Israeli forces are barred from crossing under the terms of the current ceasefire agreement.

Haaretz’s sources confirmed that one of the core strategic goals of the demolition campaign is to prevent displaced Lebanese residents from returning to their homes in border communities adjacent to Israel. The Israeli military is even using advanced digital tracking tools, including specialized statistical systems, to monitor and quantify the number of buildings destroyed across different operational sectors to measure progress on the campaign.

The policy of widespread demolition was explicitly announced by Israeli Defense Minister Israel Katz last month, who confirmed that “All houses in villages near the border in Lebanon will be demolished in accordance with the Rafah and Beit Hanoun models in Gaza.” At the time, Katz also stated that after the conclusion of Israel’s offensive in Lebanon, the Israeli military would retain full security control over the entire territory extending north to the Litani River.

The current conflict between Israel and Hezbollah erupted after US-Israeli airstrikes targeting Iran killed Iranian Supreme Leader Ali Khamenei in early March, prompting a retaliatory cross-border rocket barrage from the Iran-backed militant group. Since that escalation, the Lebanese Ministry of Health reports that Israeli attacks have killed at least 2,294 people across Lebanon — including 100 rescue workers and healthcare employees — and wounded more than 7,500 others. The violence has also displaced roughly 1.2 million Lebanese people nationwide, destroying all bridges crossing the Litani River, including the critical Qasmiyeh bridge that formed the last major transport link between southern Lebanon and the rest of the country. In the immediate aftermath of the new ceasefire taking effect, workers hastily constructed a makeshift crossing to accommodate tens of thousands of displaced residents seeking to return to their homes.

Even before the current ceasefire, there have been repeated violations of prior truce agreements. A United Nations assessment found that Israel violated the 2024 ceasefire brokered by the Biden administration more than 10,000 times over the course of one year, and has maintained five permanent military outposts inside Lebanese territory since that agreement was reached. Last week, Haaretz also reported that the Israeli military has been constructing additional new outposts inside southern Lebanon despite the terms of the current truce. Just hours before the latest ceasefire went into effect, an Israeli airstrike on a residential complex in the southern Lebanese city of Sour killed 11 people and wounded 35 more.