Seoul – Seoul said a South Korean-operated ship had an explosion and fire on Monday in the Strait of Hormuz, in an incident that U.S. President Donald Trump said was caused by Iranian attack. The South Korean foreign ministry said a fire and an explosion occurred on the vessel operated by South Korean shipper HMM. It added that no casualties were reported and authorities were investigating what caused the blaze. Trump said Iran fired shots at the South Korean cargo ship and some other targets as the U.S. launched an operation seeking to open the Strait of Hormuz to shipping. He urged South Korea to join that effort. The fire broke out in the engine room of the Panama-flagged cargo ship, where 24 crew members, including six Korean nationals, were on board, a HMM spokesperson said, adding that the cause of the fire was not clear at the moment. A handful of commercial vessels were reported to have been hit and a UAE oil port was ablaze after an Iranian strike as Trump's attempt to use the U.S.…