Iran and US end first round without deal; Strait of Hormuz remains sticking point

First-round peace negotiations between the United States and Iran concluded on April 11, 2026 after 14 hours of continuous talks in Islamabad, with both delegations announcing they would proceed to a technical expert phase in which written texts outlining each side’s positions would be exchanged. Iran’s government stated on social media that despite remaining differences, talks mediated by Pakistan would resume after a pause on April 13, marking a critical juncture in efforts to consolidate a fragile two-week ceasefire that has already begun to strain amid disputes over control of global shipping through the Strait of Hormuz.

The direct negotiations represented the first sustained face-to-face meetings between senior American and Iranian officials in nearly five decades, occurring just thirteen days after the initial joint United States-Israeli military strikes on Iran beginning February 28, 2026, which killed Iran’s Supreme Leader Ayatollah Ali Khamenei and numerous members of the country’s military and security establishment. The talks took place under extraordinary security measures in Islamabad, with Pakistani military and paramilitary forces deploying thousands of personnel to establish locked-down zones around the Serena Hotel where delegations held discussions.

What designations do both negotiating teams bring to these talks?

The American delegation was led by Vice President JD Vance, whose appointment represented a deliberate choice by President Donald Trump to signal openness to dialogue with Tehran. Vance traveled to Islamabad alongside Special Envoy Steve Witkoff and Trump’s son-in-law and senior adviser Jared Kushner. According to Iranian government statements and diplomatic sources, Vance’s prominence as one of the more publicly skeptical voices within the Trump Administration regarding the utility of continued military operations influenced Iranian officials’ willingness to engage directly.

The Iranian delegation was led by Parliament Speaker Mohammad Bagher Ghalibaf and Foreign Minister Abbas Araghchi, accompanied by approximately 70 officials, diplomats, military representatives, and technical experts from economic, legal, military, and nuclear policy sectors. Ghalibaf has served as Speaker of Iran’s Parliament since 2020 and previously held senior positions as Tehran’s mayor for twelve years and commander of the Islamic Revolutionary Guard Corps Aerospace Force. Araghchi has served as Iran’s Foreign Minister since August 2024 and is widely regarded as Iran’s most experienced and diplomatically sophisticated negotiator, having led substantial elements of Iran’s negotiations over its nuclear program that resulted in the 2015 Joint Comprehensive Plan of Action.

Both delegations had arrived in Islamabad on April 10 after Pakistan’s Prime Minister Shehbaz Sharif and Pakistan’s Chief of Defence Forces Asim Munir invited them to engage in direct talks. The Iranian delegation arrived dressed in black in symbolic mourning for Supreme Leader Khamenei and other senior officials killed in the February 28 strikes. Sharif’s office announced that Islamabad remained committed to facilitating a pathway to what it described as “durable peace in the region.”

How long did the first negotiating session extend, and what happened during the marathon talks?

The marathon 14-hour session began at approximately 1 p.m. local time on April 11 with preliminary bilateral meetings between each delegation and Pakistani mediators before moving to direct trilateral discussions involving Iranian, American, and Pakistani representatives. According to Iranian state media, the talks extended beyond midnight into Sunday morning, concluding at approximately 3:40 a.m. local time as delegations and Pakistani facilitators coordinated technical arrangements for the next phase. Senior White House officials told journalists that negotiations had continued “15 hours and counting” well into Sunday morning.

The core dispute blocking agreement centered on Iran’s demand for full sovereign control over the Strait of Hormuz, the vital waterway through which approximately 20 percent of global oil supplies flowed before the war and which Iran has substantially closed through military operations and mine-laying since February 28. Iran presented four conditions it described as non-negotiable: unqualified Iranian sovereignty over the strait and the right to levy transit fees on commercial shipping, complete payment of war reparations by the aggressor nations, unconditional release of approximately six billion dollars in Iranian assets frozen by the United States, and a region-wide durable ceasefire including an immediate end to Israeli military operations in Lebanon against the Iranian-allied Hezbollah.

The United States negotiating position centered on a 15-point proposal that would significantly curtail Iran’s military capabilities, restrict its nuclear enrichment program to levels incompatible with weapons production, address what Washington termed maritime security concerns in the Persian Gulf, and establish mechanisms to prevent Iranian threats to regional stability. President Trump had stated publicly that preventing Iran from possessing nuclear weapons represented his primary objective, describing it as “99 percent” of American war aims.

What do sources say about the negotiating atmosphere and remaining obstacles?

Pakistani sources told international media organizations that the overall atmosphere of negotiations had remained surprisingly constructive despite fundamental disagreements. However, a stalemate persisted specifically over the Strait of Hormuz issue, with sources close to the Iranian negotiating team describing American proposals on maritime control as excessive demands that Iran could not accept. An Iranian security official told CNN that the Strait of Hormuz status would remain unchanged pending agreement on a “common framework” between the two countries, and reiterated that even previously agreed-upon levels of commercial vessel traffic would not resume until such a framework existed.

The broader geopolitical context surrounding the talks remained turbulent. Israeli Prime Minister Benjamin Netanyahu announced immediately following the ceasefire that Israel’s military campaign against Iran was “not yet over” and that Israel would not accept constraints on its continued military operations against Hezbollah in Lebanon as part of any peace agreement between the United States and Iran. Israeli military operations in Lebanon continued throughout the negotiating period, with air strikes killing approximately three civilians early Sunday morning in the Lebanese town of Mefdoun, destroying residential buildings across southern Lebanese communities, and adding to a death toll that Lebanon’s health ministry reported had exceeded 2,000 since Israeli operations against Hezbollah intensified in March 2026.

How did the ceasefire agreement strain before negotiations even began?

The ceasefire between the United States and Iran, agreed on April 8 after intensive mediation by Pakistan, had been immediately strained by Israeli operations in Lebanon and Iranian assertions that the agreement included demands that were not being honored. Parliament Speaker Ghalibaf had stated on April 10, the day before talks began, that negotiations could not proceed without prior Israeli cessation of attacks on Lebanon and prior American release of frozen Iranian assets. The statement appeared designed to signal to Iran’s domestic political constituencies that their negotiator would not compromise on what Iranian officials characterized as essential principles, reflecting deep internal disagreement within Iran’s fragmented leadership structure over how much to concede in talks.

What military operations are underway to reopen the Strait of Hormuz?

Two United States Navy guided-missile destroyers, the USS Frank E. Peterson and USS Michael Murphy, transited the Strait of Hormuz on April 11, marking the first passage of American military vessels through the waterway since the conflict began on February 28. United States Central Command announced that the destroyers were conducting mine-clearing operations in coordination with broader efforts to establish safe passages for commercial shipping, and stated that cleared pathways would be shared with the international maritime industry. President Trump claimed on social media that all Iranian mine-laying vessels had been destroyed and that Iran’s naval capabilities had been eliminated.

How did the February 28 conflict reshape the Middle East and global energy markets?

The February 28 United States-Israeli air campaign struck Iranian military installations, government facilities, and leadership positions across the country, killing Supreme Leader Khamenei and numerous senior Revolutionary Guard commanders, military strategists, and government officials. Iran responded with ballistic missile and unmanned aerial vehicle attacks against Israeli targets and American military bases and facilities throughout the Persian Gulf region, as well as implementing a near-complete closure of the Strait of Hormuz through military operations, mine-laying, and threats of further interdiction.

The conflict’s humanitarian toll extended far beyond Iran’s borders. Israeli military operations in Lebanon against Hezbollah between March and April 2026 had killed more than 2,000 people according to Lebanon’s health ministry, with additional numbers of civilian casualties reported in Gaza and across the region from secondary effects of the broader escalation. The disruption to global shipping and energy supplies caused by closure of the Strait of Hormuz was unprecedented in scale, contributing to dramatic increases in oil and energy prices worldwide, straining economies across Europe, Asia, and North America, and triggering domestic fuel crises in countries including Ireland, which reported that one third of petrol stations had run out of supplies as of April 11.

What did the international community say about the Islamabad talks?

International response to the Islamabad talks reflected cautious optimism tempered by skepticism about whether fundamental positions could narrow. The United Kingdom’s Prime Minister Keir Starmer welcomed the ceasefire and negotiations as bringing “a moment of relief to the region and the world.” Qatar’s Foreign Ministry characterized the ceasefire as “an initial step toward de-escalation” and expressed conditional hope that Iran would cease military actions against regional stability. The United Arab Emirates, a major oil-producing state directly affected by Strait of Hormuz closure, called for specific arrangements addressing Iran’s ballistic missile programs and nuclear capabilities, with United Arab Emirates industry minister Sultan Al Jaber publicly stating that the Strait of Hormuz remained under Iranian control and was not genuinely open to unrestricted commercial traffic.

How are energy markets responding to the ceasefire and talks?

Energy markets began recovering modestly following the ceasefire announcement and commencement of talks, signaling cautious market expectations that some level of oil supply disruption might ease. Oil futures prices fell sharply in the days following April 8, and gasoline prices in the United States declined by nearly two cents per gallon to an average of four dollars and fourteen cents on April 11, marking the largest single-day drop since December 2023. However, retail gasoline prices remained substantially elevated compared to pre-war levels, and energy markets continued monitoring the Islamabad negotiations closely for signals of breakthrough or further deterioration.

What happens in the expert-level phase, and when will talks resume?

The technical expert phase beginning after the April 11 session represented a shift toward more detailed negotiation on specific terms. Iranian and American expert teams would exchange written texts documenting their respective positions on nuclear enrichment parameters, sanctions relief mechanisms, maritime access protocols, regional ceasefire arrangements, and reconstruction obligations. Pakistani facilitators indicated that a second round of direct negotiations would follow the expert text-exchange phase, with timing dependent on whether the technical discussions yielded sufficient convergence to justify continued high-level engagement. Iran’s government stated that talks would resume on April 13 after a pause following the first round.