The Iranian tanker Adrian Daria-1 has unloaded its oil at a Syrian port after it was released by British government authorities in Gibraltar, Middle East Eye reported.

The British website quoted two sources that the tanker unloaded 55% of its total cargo (two million barrels) in one of the ports of Syria on Thursday evening.

Several oil tanker monitoring sites said the tanker was stationed between Cyprus and Syria on Monday afternoon.

The tanker was released on August 19. On that day, Gibraltar authorities said they had received assurances from Iran that the tanker would not travel to Syria.

Earlier, Reuters quoted US Secretary of State Mike Pompeo as asserting that his country has credible information that "Adrian Daria-1" is heading to Syria,

The minister expressed hope that the tanker changed course, pointing out that the British confidence in the assurances of the Iranian Foreign Minister was a big mistake.

It is noteworthy that the British Navy detained the tanker five weeks off the coast of Gibraltar on charges of violating European sanctions on Syria.

The decision to release the tanker came after Iran's Revolutionary Guards responded by seizing a British-flagged oil tanker in the Strait of Hormuz.

Iran is still holding the tanker and has released only seven of its 23 crew.