The Iranian tanker caught in a standoff between Tehran and the West left Gibraltar on Sunday night, shipping data showed, hours after the British territory rejected a U.S. request to detain the vessel further. British Royal Marines seized the tanker in Gibraltar in July on suspicion it was carrying oil to Syria, a close ally of Iran, in violation of European Union sanctions. The Grace 1, renamed the Adrian Darya 1, left anchorage off Gibraltar around 11 p.m. (2100 GMT), Refinitiv shipping data showed.