The UK-flagged supertanker Pacific Voyager that halted in the Gulf on Saturday is "safe and well," a British official told Reuters, after Iran dismissed reports its Revolutionary Guards had seized the vessel. An Iranian commander, reportedly, on Friday had threatened to seize a British ship in retaliation for the capture by Royal Marines of Iranian supertanker Grace 1 in Gibraltar. The Pacific Voyager stopped in the Gulf coming from Singapore, before resuming its course, Refinitiv Eikon mapping showed. It stopped as part of a routine procedure to adjust its arrival time at its next port, an official at UK Maritime Trade Operations (UKMTO) told Reuters. UKMTO, which coordinates shipping in the Gulf, had been in contact with the tanker, the official said. U.S. President Donald Trump and British Prime Minister Theresa May discussed ways to maintain pressure on Iran during a phone call on Friday, the White House said in a statement on Saturday.