Iran has stated that the controversial tanker Adrian Darya 1 already offloaded its crude cargo, but satellite imagery and vessel-tracking data tell a different story.

Iranian foreign ministry spokesman Abbas Mousavi said on Sunday that the 301,000-dwt VLCC (built 1997) discharged at a Mediterranean port, the official IRNA news agency reported.

"We had already said that we would sell our oil, and acts of vexation would have no effect on our plans," Mousavi added.

He said US pressure to seize the vessel was a violation of international maritime regulations, and such measures would only cause "trouble for those who take them."