Ceasefire on a Knife's Edge: Iran Threatens Retaliation Over Beirut, US-Iran Nuclear Talks Stall

The Middle East teetered on the edge of a wider conflagration on Thursday as Iran threatened to retaliate if Israel strikes Beirut, even as fragile ceasefire arrangements in Lebanon inched forward and US-Iran nuclear negotiations hit a fresh wall over Tehran's demand for upfront cash payments.

Iranian Foreign Minister Seyed Abbas Araghchi issued one of Tehran's starkest warnings yet, saying Iran's armed forces remain on high alert and would strike Israel if Beirut came under attack. "We informed the American side that if Beirut were attacked, we would not tolerate it under any circumstances," Araghchi said in an interview with Lebanese broadcaster Al Mayadeen, adding that such an action would signal a complete breakdown of the ceasefire.

Despite the warnings, Israel and Lebanon reached a tentative ceasefire agreement on Wednesday, brokered through intensive US mediation, requiring a complete cessation of Hezbollah fire and withdrawal of its fighters south of the Litani River. Lebanese President Joseph Aoun described the deal as a "last opportunity," though its durability remains uncertain — it is the third such ceasefire between the parties, and Israeli strikes in southern Lebanon continued even after the announcement, killing at least one person.

On the diplomatic front, US-Iran nuclear talks appear to be stuck on a fundamental disagreement: Tehran is insisting on the partial release of billions of dollars in frozen assets — in liquid cash — before committing to any concrete steps. Mediators have spent days trying to bridge the gap without success. President Donald Trump, meanwhile, expressed optimism, saying the Strait of Hormuz would reopen "immediately upon signing" a deal and that US minesweeping assets are already deployed in the area.

The military dimension of the conflict continued in parallel. Iran launched missiles and drones toward US bases in Kuwait and Bahrain overnight, though all were intercepted or failed in flight. The US responded with strikes on an Iranian military facility on Qeshm Island. A seventh vessel attempting to breach America's naval blockade of Iran was also disabled, with a US aircraft firing a Hellfire missile into its engine room.

Back in Washington, the House of Representatives delivered a political blow to the Trump administration, passing a War Powers Resolution 215–208 to halt the conflict pending formal congressional authorisation — a rare bipartisan rebuke that underscores growing unease on Capitol Hill over the direction and cost of the war.

With oil hovering near $97 a barrel, ceasefire agreements fraying within hours of being signed, and negotiations deadlocked, the road to a lasting settlement in the Middle East remains long and treacherous.