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US-Iran Nuclear Negotiations Stall over Enrichment Dispute

Oman-mediated talks ended with cautious optimism in the absence of an enrichment accord

U.S. President Donald Trump delivers remarks at the annual National Memorial Day Observance in the Memorial Amphitheater at Arlington National Cemetery in Arlington, Virginia, U.S., May 26, 2025. REUTERS/Ken Cedeno/File Photo
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Overview

  • Five rounds of indirect talks in Oman and Rome since April concluded with mediators noting some but not conclusive progress.
  • Iran has raised its uranium enrichment to 60 percent purity, far above the 2015 accord cap, prompting US calls for a complete halt.
  • The US demands cessation of enrichment as a non-negotiable condition, while Iran insists any deal must lift all sanctions and preserve its enrichment rights.
  • Oman has floated either a six-month suspension of Iran’s enrichment activities or the creation of a regional nuclear consortium under IAEA oversight, proposals Iran has not yet accepted.
  • IAEA Director Rafael Grossi cautions that an agreement remains uncertain as both Washington and Tehran warn military options could follow a diplomatic breakdown.