President Donald Trump declared a mediator-proposed cease-fire between the U.S. and Iran a “significant step” but insufficient as his Tuesday deadline loomed. Trump warned that failure to reopen the Strait of Hormuz would trigger massive attacks on Iranian bridges and power plants, potentially sending the country “back to the Stone Ages.”

Diplomatic talks led by Pakistan continued, but Iran rejected any temporary pause, demanding a complete end to hostilities and sanctions relief. Regional officials confirmed Iran’s 10-point proposal included joint Omani administration of the strait, guaranteed sanctions removal, and war compensation approved by Congress and the United Nations.

Trump’s administration, including Vice President JD Vance and envoy Steve Witkoff, engaged in limited direct contact with Iran through intermediaries. The president extended previous self-imposed deadlines but maintained his threat of devastating strikes. Iranian military officials warned of forceful retaliation if civilian targets were attacked, while Trump suggested the U.S. might help rebuild Iran if a comprehensive deal emerges.