Fresh diplomatic efforts between Israel and Lebanon are set to get underway in Washington, D.C. today, as both sides move forward with talks aimed at easing longstanding tensions.

The discussions are scheduled to begin at 11:00 ET (15:00 GMT), with Marco Rubio expected to participate, according to a U.S. State Department memo.

Representing their respective countries will be Yechiel Leiter and Nada Hamadeh Moawad, both of whom are set to take part in the high-level meeting.

Officials say the ambassadors will briefly address the press ahead of the session, after which discussions will continue behind closed doors.

U.S. President Donald Trump has announced a major escalation in tensions with Iran, declaring that the United States will begin a naval blockade of the Strait of Hormuz following the collapse of negotiations over Tehran’s nuclear ambitions.

In a series of lengthy social media posts, Trump said he had instructed the U.S. Navy to “seek and interdict every vessel in international waters that has paid a toll to Iran,” describing such payments as illegal. He added that any ship complying with Iran’s system would no longer be guaranteed “safe passage” on the high seas.

While the president did not specify how that threat would be enforced, recent U.S. naval operations — including the boarding of vessels linked to sanctioned countries — suggest that interdictions, inspections, or seizures could be used. Trump also indicated that “other countries” may participate in the blockade effort, though he did not name any potential allies.

The move follows the breakdown of diplomatic efforts between Washington and Tehran, with both sides remaining far apart on key issues surrounding Iran’s nuclear programme. Despite Trump’s suggestion that Iran may be willing to reopen the strait, Iranian officials have consistently signaled the opposite, emphasizing their control over the vital maritime corridor as a key source of strategic leverage.

In recent months, Iran has implemented a selective restriction of traffic through the Strait of Hormuz, one of the world’s most critical energy chokepoints. Passage has largely been limited to vessels from countries considered friendly to Tehran or ships believed to have paid a reported toll of around $2 million.

The U.S. response now aims to disrupt that arrangement entirely, effectively countering Iran’s influence over the waterway. Analysts note that while this does not yet amount to a full-scale resumption of hostilities, it represents a significant escalation with potentially far-reaching consequences.

The Strait of Hormuz is a vital artery for global energy supplies, with roughly one-fifth of the world’s oil and gas passing through it. Any sustained disruption could tighten supply, drive up global oil prices, and trigger wider economic impacts.

After nearly half a century of hostility—including two wars in the past two years—Iran and the United States are now engaged in extended face-to-face talks, signaling a notable shift in relations between the two adversaries.

Negotiations in Islamabad have stretched for hours, with parallel discussions among technical experts also continuing. The sustained engagement reflects a level of seriousness and coordination not often seen between Washington and Tehran in recent years.

The breakthrough appears driven by the seniority and authority of both delegations, alongside a mutual willingness to re-engage diplomatically despite deep-rooted mistrust. Iran, in particular, arrived at the talks emphasizing skepticism toward negotiations, especially after previous diplomatic efforts over the past year were derailed by renewed conflict.

Tehran reportedly insisted on engaging with top-level US leadership, including JD Vance, who is viewed within Donald Trump’s administration as a leading voice against prolonged military interventions.

The current effort draws inevitable comparisons to the Iran nuclear deal, which required 18 months of complex negotiations, marked by repeated setbacks before reaching agreement. By contrast, Trump has often favored faster, more decisive diplomatic outcomes.

While the present talks remain in their early stages, their continuation alone represents a meaningful development. With tensions still high and the risk of further escalation lingering, even incremental diplomatic progress could play a critical role in reducing the likelihood of renewed conflict.