US Naval Blockade of Iranian Ports Begins as Pakistan-Facilitated Talks Break Down

The United States implements a naval blockade of Iranian ports on April 13, 2026, escalating military pressure on Tehran after the first round of U.S.-Iran talks in Islamabad collapsed on April 11-12 following 21 hours of negotiations. The primary sticking point was Iran's insistence on the right to civilian uranium enrichment versus the U.S. demand for a complete halt to enrichment. Pakistan served as the facilitating host; its foreign ministry announces readiness to host a second, multi-day round. The White House expresses public optimism about eventually reaching a deal even as the blockade begins. Iran's Foreign Ministry signals uncertainty about returning to the table, calling the U.S. posture contradictory. The episode marks the most significant direct diplomatic engagement between Washington and Tehran in over a decade.