A British-flagged oil tanker is leaving Iran, after being held for more than two months.
The Stena Impero's Swedish owner, Stena Bulk, said it was on the move from the Bandar Abbas port, where it has been anchored since July.
The vessel was seized by Iranian troops in the Strait of Hormuz after they accused it of breaking maritime rules.
A detention order against it was lifted earlier this week, but officials said an investigation was still ongoing.
Its seizure came two weeks after an Iranian tanker was held off Gibraltar with the help of the Royal Marines.
That ship was suspected of violating EU sanctions on Syria, but was released in August.
The operation against the Stena Impero was seen as retaliation for Britain's role in helping to seize the Iranian vessel, a link Tehran denied.
Why was the tanker seized?
The Stena Impero was passing through international waters in the Strait of Hormuz, a narrow waterway that connects the Gulf and the Indian Ocean, on 19 July when it was detained by Iran's Islamic Revolution Guard Corps.
Iran accused the vessel of colliding with a fishing boat and failing to respond to calls but the ship's owners denied there was evidence of this.
The UK said it deployed a Royal Navy frigate to come to the tanker's aid and warned Iranian authorities that their actions were illegal, but were unable to reach the scene in time.
The Stena Impero was then transported to Bandar Abbas, where it has remained anchored since.
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