DUBAI, United Arab Emirates: The US said it took out more than a dozen mine-laying Iranian vessels Tuesday, and the Islamic Republic vowed to block the region’s oil exports, saying it would not allow “even a single liter” to be shipped to its enemies. As concerns grew about the war’s effect on a strategic waterway, the American military said it destroyed 16 minelayers, though President Donald Trump said in social media posts that there were no reports of Iran planting explosives in the Strait of Hormuz, through which 20 percent of the world’s oil is shipped.

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Trump threatened Iran with "military consequences at a level never seen before" after U.S. intelligence found indications the country may be preparing to mine the world's most…