Sharif said in a post on X that he appreciated Trump’s acceptance of Pakistan’s request to prolong the truce, allowing diplomatic efforts to continue.

He added that both sides should adhere to the ceasefire and work toward a comprehensive “peace deal” during a second round of talks scheduled in Islamabad.

Trump extended the ceasefire to provide more time for negotiations, pending the submission of a proposal by Iran.

Pakistan has sought to position itself as a facilitator in the talks, with Sharif indicating confidence that continued engagement could help bring the conflict to a negotiated conclusion.

A Pakistani source involved in the negotiations said discussions were “on track” for Wednesday, despite earlier indications from Iran that it might not attend. U.S. President Donald Trump could join the talks either in person or virtually if an agreement is reached, the source added.

U.S. Vice President JD Vance is expected to travel to Pakistan for the переговоры, according to media reports, while Iranian officials said Tehran was “positively reviewing” whether to send a delegation, without confirming participation.

The diplomatic push comes as a two-week ceasefire in the conflict, which began on February 28, nears its end. A Pakistani source said the truce is expected to expire late Wednesday U.S. time.Financial markets reacted to signs of renewed diplomacy, with oil prices falling more than $1 and equities rising in early Asian trading amid expectations that talks could resume.

Brent crude traded near $94 a barrel, while U.S. West Texas Intermediate fell below $88.Tensions remain elevated, however, following disputes over the U.S. blockade of Iranian ports and the recent interception of an Iranian vessel.

Tehran condemned the seizure and warned Washington would bear responsibility for any escalation.Iranian officials also reiterated that they would not negotiate under pressure. Senior figures, including Mohammad Bagher Qalibaf, accused Washington of attempting to force concessions through economic and military pressure.

Washington has said it seeks an agreement that would prevent Iran from developing nuclear weapons while stabilizing energy markets. Tehran, for its part, is seeking relief from sanctions and an end to hostilities without compromising its nuclear program.

The strategic importance of the Strait of Hormuz remains central to the negotiations, as the waterway handles a significant share of global oil and gas shipments and has been affected by restrictions imposed during the conflict.

Pakistan, acting as a mediator, has deployed nearly 20,000 security personnel in Islamabad ahead of the potential talks, underscoring the high stakes and security concerns surrounding the negotiations.

In a readout issued by Downing Street, a spokesperson said the two leaders discussed the failed negotiations held in Pakistan over the weekend and agreed it was “vital” to maintain the ceasefire while seeking a path forward through dialogue.

Starmer, who recently returned from meetings in the Middle East, also said international partners were working to restore safe navigation through the Strait of Hormuz, a key global energy transit route, and reaffirmed Britain’s commitment to Oman’s security.

UK Health Secretary Wes Streeting described the breakdown in talks as “disappointing,” while emphasizing that continued engagement remained necessary to achieve a sustainable end to the conflict.

Speaking to Sky News, he said diplomacy often requires persistence, adding that lack of immediate success did not diminish the value of ongoing negotiations.

Streeting also criticized comments made earlier by U.S. President Donald Trump during the crisis, calling them “extraordinary,” particularly remarks he said appeared to threaten Iranian civilization.

Separately, Australian Foreign Minister Penny Wong called for the continuation of the Middle East ceasefire and a return to negotiations, stating that the outcome of the Islamabad talks was disappointing but underscoring the need for further diplomatic efforts.

The statements come after high-level U.S.-Iran talks ended without agreement, prolonging uncertainty over a conflict that has disrupted regional stability and global energy markets.

Pakistan’s Foreign Minister Ishaq Dar said it was “imperative” that both parties maintain their ceasefire commitments, adding that Islamabad would continue facilitating dialogue between Washington and Tehran following the inconclusive talks.

U.S. Vice President JD Vance, who led the American delegation, said the absence of a deal was “bad news for Iran much more than it’s bad news for the United States,” reiterating Washington’s demand for a firm commitment from Tehran not to pursue nuclear weapons capability.

He said the United States had made its “red lines” clear, including preventing Iran from acquiring both nuclear weapons and the means to rapidly develop them.

Iranian officials rejected the U.S. position, with state-linked Tasnim news agency reporting that “excessive” American demands had hindered progress. Tehran signaled that discussions would continue, with technical teams expected to exchange documents in follow-up engagements.

Iran’s parliamentary speaker Mohammad Baqer Qalibaf said the U.S. had failed to build trust during the talks despite what he described as “forward-looking” proposals from the Iranian side. He emphasized longstanding skepticism rooted in past negotiations, saying Washington must demonstrate credibility before progress can be made.

Iran’s foreign ministry also downplayed the outcome, stating that no agreement had been expected in a single session and expressing confidence that diplomatic contacts would continue with Pakistan and other regional actors.

Former Iranian foreign minister Mohammad Javad Zarif attributed the breakdown to what he called U.S. attempts to “dictate” terms, warning that negotiations with Iran would not succeed under unilateral conditions.

The Islamabad meeting marked the highest-level direct engagement between the United States and Iran in more than a decade and the most senior talks since the 1979 Islamic Revolution.

The discussions were aimed at halting a conflict that began over six weeks ago and has driven up global oil prices while threatening key maritime routes.Central to the negotiations was the Strait of Hormuz, a critical chokepoint for roughly one-fifth of global energy supplies.

The U.S. military said it was preparing to ensure safe navigation through the waterway, including mine-clearing operations, while Iranian state media denied any U.S. naval transit in the area.

Tehran has demanded control over the strait, war reparations, and broader ceasefire arrangements extending to regional theaters including Lebanon. U.S. officials have focused on securing freedom of navigation and curbing Iran’s nuclear enrichment capabilities.

The talks took place under tight security in Islamabad, where thousands of paramilitary forces were deployed. Pakistani officials described fluctuating tensions during the discussions, with “mood swings” and intermittent progress reported by sources familiar with the negotiations.

The Iranian delegation, which arrived dressed in black to mourn those killed in the conflict, also raised concerns about a U.S. airstrike on a school near a military compound, an incident the Pentagon has said is under investigation.

Despite the impasse, analysts noted the seniority and size of the Iranian delegation as an indication of Tehran’s willingness to engage, even as deep mistrust continues to define the diplomatic landscape.