Iran has reversed course on reopening the Strait of Hormuz and fired on a tanker attempting to pass the waterway. It said it will continue blocking transit as long as the U.S. blockade of Iranian ports remained in effect. The announcement Saturday came after U.S. President Donald Trump said the blockade “will remain in full force” until Tehran reaches a deal with the U.S. that includes its nuclear program. Tehran had reopened the strait Friday to commercial vessels. Roughly one-fifth of the world’s oil passes through the strait. Pakistani officials say the United States and Iran are moving closer to a deal ahead of the April 22 ceasefire deadline.