The Stena Impero was headed to Saudi Arabia but left the international sea lanes and headed north towards the Iranian island of Qeshm, marine tracking data showed on Friday.
Prior to the seizure, the tanker turned off its tracking device and had ignored warnings, Iranian military sources told state media.
"The reason behind the detention of the British tanker is that it did not adhere to the sea routes in the Strait of Hormuz, turned off the automatic identification system (AIS), polluted international waters and did not pay attention to the warnings of Iran," the source said.
Comment: The tanker allegedly ignored a distress call from an Iranian fishing boat, according to the Iranians:
The IRGC intervened because the ship "got involved in an accident with an Iranian fishing boat" and did not respond to its "distress call," the director of ports and maritime affairs of Iran's southern Hormozgan province, Allahmorad Afifipour, said.
The tanker was taken to the port city of Bandar Abbas and "all of its 23 crew members will remain on the ship until the probe is over," the official stated.















Comment: The beginning of tit-for-tat? After all, the UK began this round with its seizure of the supertanker Grace 1 off the coast of Gibraltar.
Iran ups the ante, taking custody of a second tanker (later released after being reminded of the rules of the water): In response the UK issued this statement: Analysts feel Iran had to make a move in response to the combination of the UK's hijacking of the Grace 1, the pressure of American sanction and European inaction: Britain advised its commercial assets to avoid the Strait for now. According to the IRGC, a British warship tried to stop Iran from seizing the tanker: