US and Iran Islamabad Peace Negotiations Collapse After Marathon 21-Hour Diplomatic Session

Negotiations between JD Vance and Iranian officials end without a deal as both sides fail to agree on nuclear terms and the Strait of Hormuz.

By: AXL Media

Published: Apr 12, 2026, 5:48 AM EDT

Source: Information for this report was sourced from The Guardian

Diplomatic Deadlock After Historic Face-to-Face Summit

A marathon 21-hour diplomatic session in Pakistan, marking the highest level of direct engagement between Washington and Tehran in decades, ended in failure early Sunday morning. The US delegation, led by Vice-President JD Vance, departed Islamabad after failing to secure a peace agreement intended to halt the ongoing US-Israel war with Iran. Despite the historic nature of the face-to-face meetings, both sides remained entrenched in their respective positions. Vance confirmed that while the US had attempted to negotiate in good faith, the Iranian leadership chose not to accept the terms proposed by the American team, leading to a complete breakdown in the current diplomatic process.

Nuclear Proliferation and Strategic Red Lines

The primary obstacle to the agreement centered on Iran’s nuclear capabilities and future development. According to JD Vance, the United States required an affirmative, long-term commitment from Tehran to refrain from seeking nuclear weapons or the tools necessary to achieve them. While the US noted that previously existing enrichment facilities had been destroyed, the administration sought a fundamental commitment of will that Iran would not pursue a nuclear program in the future. Iranian officials, however, maintained that their rights and interests were being overlooked, leading to a stalemate over what the US characterized as non-negotiable "red lines" for regional security.

Conflict Over the Strait of Hormuz and Reparations

Beyond nuclear concerns, the strategic Strait of Hormuz remained a point of serious disagreement throughout the talks. Iranian negotiators demanded the unblocking of frozen assets, the payment of war reparations, and a complete cessation of hostilities against Iran. Conversely, the US military reported efforts to set conditions for clearing mines in the waterway, a claim that was later denied by Iranian military command. Iranian state broadcaster IRIB asserted that the talks scuppered specifically because of "unreasonable demands" from the US side regarding the maritime corridor and sanctions relief, which Tehran viewed as an infringement on its national interests.