Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. British Seek Clues to Iranian Sanction Busting From Crew of Seized Tanker Martin Arostegui ALGECIRAS, SPAIN - British police on Friday were questioning the crew of an Iranian supertanker that was seized at 4 a.m. Thursday in waters near Gibraltar, and which remains anchored close to the eastern shore of what locals refer to as "the Rock." Gibraltar's supreme court announced it was extending the authority to hold the ship for 14 more days, saying there are "reasonable grounds to believe that the vessel was acting in breach of established of EU sanctions against Syria." A spokesperson for Gibraltar's government told VOA that an initial order to seize the vessel for up to 72 hours was issued the day before it was boarded by 30 Royal Marines flown in from Britain. The seizure of the 1,000-meter tankerGrace 1as it stopped at Gibraltar for scheduled reprovisioning bears the hallmarks of a planned military operation aided by satellite and on-ground reconnaissance, as well as special forces. According to the British Foreign Office,Grace 1had loaded oil in Iraq that was destined for Syrian refineries sanctioned by the EU. Analysts said the unusual route around Africa and through the Strait of Gibraltar suggests the ship's operators wanted to avoid the shorter route through the Suez Canal, where it could have been more easily subject to inspection and boarding by Egypt. Spanish Foreign Minister Josep Borrel told reporters in Brussels the seizure had been requested by the U.S. He said Washington supplied information about the ship's destination and its cargo to the British government, which informed Spain only at the last minute about the planned boarding operation, in what Madrid considers to be its territorial waters. "Prior to the intervention by British forces, the UK had maintained, through opportune channels, consultations with Spain in which it shared suspicions that Grace 1, which was expected to stop in Gibraltar, transported a cargo of crude whose final destination was Syria, which British forces would act to embargo," according to a Spanish Foreign Ministry statement. .