A U.S. naval blockade of the Strait of Hormuz is likely primarily an economic pressure tool rather than an immediate trigger for war, but it will elevate the risk of conflict that further disrupts energy markets and the global economy. Hours after talks between Iran and the United States in Islamabad, Pakistan, over the weekend of April 10-12 concluded without a deal, U.S. President Donald Trump announced via Truth Social that the U.S. Navy would blockade the Strait of Hormuz . The post said all vessels would be blocked from transiting the strait, including those paying tolls to Iran in return for safe passage.