The U.S. Navy has warned commercial shipping that “dangerous military activities” will take place in and around the Strait of Hormuz, cautioning that vessels suspected of supporting mine-laying operations could be targeted and that the U.S. blockade of Iranian ports remains in force. The warning was issued May 29 by U.S. Naval Forces Central Command through the Joint Maritime Information Center and shared with shipping operators via the United Kingdom Maritime Trade Operations office. It comes as Washington and Tehran continue negotiations over a possible agreement to extend a fragile ceasefire and prevent a resumption of war. “The maritime security threat level in the [Strait of Hormuz] remains critical due to ongoing military conflict,” said the advisory, which was issued on the same day that President Donald Trump called for the narrow shipping lane connecting the Persian Gulf to global markets to be “immediately open” and that any mines set in the strait by Iranian forces must be “terminated.”...