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Story summary
- The United States has blocked Iranian ports after unsuccessful ceasefire talks in Islamabad.
- The blockade aims to pressure Iran over its nuclear program and the Strait of Hormuz.
- U.S. Vice President JD Vance says Iran must commit to not developing nuclear weapons.
- Iranian officials criticized the demands and warned that approaching vessels would breach the ceasefire.
- Pakistan's mediating role remains crucial.
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