Pakistan’s efforts to mediate an end to hostilities between the United States, Israel, and Iran are reaching a “critical, sensitive” stage, Iran’s ambassador to Pakistan, Reza Amiri Moghadam, said on Tuesday.

A framework to halt the conflict has been reportedly prepared by Pakistan and shared with both Iran and the U.S., according to a source familiar with the matter. The plan outlines a two-tier approach: an immediate ceasefire followed by a broader, comprehensive agreement.

The initiative is being seen as a last attempt to prevent a dramatic escalation that could target Iranian civilian infrastructure and provoke retaliation against energy and water facilities across the region.

Pakistan, however, has maintained a guarded stance regarding the specifics of its role in the mediation and has not confirmed the details of the proposed framework.

U.S. President Donald Trump has called for a swift resolution, warning of severe consequences if a ceasefire is not reached promptly. Trump said on Monday that Iranian forces were “willing to suffer” for their freedom, citing intercepted communications urging continued attacks, and reiterated that U.S. action against Iran’s energy infrastructure and bridges could follow if negotiations fail.

The ongoing conflict has already increased volatility in global energy markets, with traders closely monitoring developments that could impact the flow of oil through the Strait of Hormuz, a key regional chokepoint.