Iran's Revolutionary Guard on Saturday released footage showing members of its forces seizing a British-flagged tanker at sea near Iranian ports in the Strait of Hormuz.
The footage shows commandos in black ski masks on board a helicopter before rappelling on to the Stena Impero's deck, while a number of speedboats surround the vessel.
The tanker was seized with a crew of 23 crew aboard, although none are British nationals.
Senior Iranian officials said on Saturday that Friday's seizure happened in response to Britain's role in impounding an Iranian supertanker two weeks earlier.
The seizure prompted condemnation from the UK and its European allies as they continue to call for a de-escalation of tensions in the critical waterway.