Diplomats from Pakistan, Egypt, and Turkey are intensifying shuttle negotiations with Washington and Tehran, hoping to resolve stalled nuclear talks before a ceasefire agreement expires on April 21.
Both sides maintain they can reach a deal, though significant gaps remain over uranium enrichment and the release of frozen Iranian assets. A regional source involved in the mediation efforts rejected characterizations of complete breakdown, saying "the door is not closed yet. Both sides are bargaining."
The push comes after 21 hours of direct negotiations in Islamabad between Vice President JD Vance and Iranian officials ended without agreement. Vance, leading the U.S. team, told counterparts the Islamabad proposal represents Iran's best available option. A U.S. official said the talks, though "tough," evolved into "a friendly and productive exchange of proposals."
Iran's Foreign Minister Abbas Araghchi claimed negotiators were "inches away" from a breakthrough before the U.S. "shifted the goalposts." U.S. officials and regional sources did not confirm that characterization, though they acknowledged meaningful progress occurred.
The core dispute centers on nuclear constraints. The U.S. demands Iran freeze uranium enrichment activities and eliminate its stockpile of highly enriched uranium. Iran, in return, seeks substantial release of frozen funds currently held in foreign accounts. Neither side has moved sufficiently to close these gaps.
Iran's ambassador to Pakistan, Reza Amiri Moghadam, who participated in the negotiations, framed the Islamabad round as a foundation for future diplomacy rather than a failure. He posted on social media that success depends on whether both parties strengthen trust and commitment to a sustainable framework.
The diplomatic push intensified over the weekend. Turkish and Egyptian foreign ministers held separate phone calls with Pakistan's counterpart, then briefed White House envoy Steve Witkoff and Iran's Araghchi on their assessments.
Pressure Mounts with Military Escalation
President Trump signaled willingness to resume military operations if the nuclear standoff persists. According to sources familiar with the discussions, Trump is considering fresh strikes against Iranian infrastructure targets he previously identified as threats.
The administration launched a naval blockade of Iranian ports Monday morning at 10 a.m. ET, with U.S. Central Command pledging to enforce it uniformly against all vessels entering Iranian territorial waters. The blockade specifically aims to prevent Iran from leveraging the Strait of Hormuz as a negotiating tool.
A U.S. official clarified that both the blockade and the U.S. decision to leave Islamabad early are themselves negotiating tactics. Trump's strategy appears designed to pressure Iran toward nuclear concessions by restricting its economic lifelines.
CENTCOM stressed that the blockade would not impede international shipping transiting the strait to and from non-Iranian ports, an effort to limit disruption to global trade.
Vance left Islamabad expressing hope that Iranian leaders will reconsider their position during coming days and recognize mutual benefit in accepting the current terms. Regional and American mediators are now racing against the April 21 ceasefire deadline to narrow the remaining distance and schedule another formal negotiating round.
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