Iranian oil tanker pursued by US changes destination to Turkey

The crew of the Adrian Darya 1, formerly known as the Grace 1, updated its listed destination in its Automatic Identification System to Mersin, Turkey, a port city in the country's south and home to an oil terminal.

However, mariners can input any destination into the AIS, so Turkey may not be its true destination. Mersin is some 200 kilometers northwest of a refinery in Baniyas, Syria, where UK authorities alleged the Adrian Darya had been heading before they seized it off the British territory of Gibraltar in early July.

The US and the European Union have imposed sanctions on the export of oil to Syria.

Iranian state media and officials did not immediately acknowledge the new reported destination of the Adrian Darya, which carries 2.1 million barrels of Iranian crude oil worth some $130 million.

Nor was there any immediate reaction from Turkey, whose President Recep Tayyip Erdogan deals directly with Tehran and Russia over Syria's long-running conflict.

Read more: Will the release of the Adrian Darya-1 affect US-UK relations?

The ship-tracking website MarineTraffic.com showed the Adrian Darya's position as just south of Sicily in the Mediterranean Sea. At current speeds, it estimated the Adrian Darya would reach Mersin in about a week.

The State Department did not immediately respond to a request for comment.

The Adrian Darya's detention and later release by Gibraltar have added fuel to the growing tensions between Washington and Tehran, after Trump unilaterally withdrew America from Iran's 2015 nuclear deal with world powers over a year ago over concerns about Iran's ballistic missile program and regional influence.

In the time since, Iran lost billions of dollars in business deals allowed by the deal, as the US re-imposed and created sanctions largely blocking Tehran from selling crude oil aboard, a crucial source of hard currency for the Islamic Republic.

In US federal court documents, authorities allege the Adrian Grace's true owner is Iran's Revolutionary Guard, a paramilitary organization answerable only to Supreme Leader Ayatollah Ali Khamenei.

The US declared the Guard a foreign terror organisation in April, the first time America named a military force of a nation as such, giving it the legal power to issue a warrant for the vessel's seizure. However, that would require another nation to acknowledge the writ.

The Adrian Darya had put its intended destination as Kalamata, Greece, even though the port did not have the infrastructure to offload oil from the tanker. The State Department then pressured Greece not to aid the vessel.

Meanwhile, Iran continues to hold the British-flagged oil tanker Stena Impero, which it seized in a commando-style raid on July 19 after the taking of the Adrian Darya. Analysts suggested the release of the Adrian Darya would see the Stena Impero let go, but that has yet to happen.