DUBAI—Oman on Wednesday identified the Panama-flagged Asphalt Princess as the tanker involved in a hijacking which Britain’s maritime trade agency earlier said was over. The statement by Oman’s Maritime Security Centre was the first official confirmation of Tuesday’s incident in the Arabian Sea which maritime security sources had told Reuters involved suspected Iranian-backed forces. Iran denied any involvement. The United Kingdom Maritime Trade Operations (UKMTO) said in a warning notice based on a third-party source on Wednesday that people who had boarded a tanker involved in a “potential hijack” had since left and that the vessel, which it did not identify, was safe. The AIS tracking status of the asphalt/bitumen tanker Asphalt Princess was “Underway Using Engine” early on Wednesday, according to Refinitiv ship tracking data. The Oman Maritime Security Centre said in a statement it had received information about the Asphalt Princess being subjected “to a hijacking incident in …