UK government convened an emergency COBRA meeting to formulate its response The Stena company responsible for the ship also released a statement TEHRAN: Iran"s Revolutionary Guard Corps announced on Friday they had confiscated a British tanker in the strategic Strait of Hormuz for breaking "international maritime rules," while a US official told CNN that Iran had seized a second tanker, the British-owned, Liberian-flagged MV Mesdar, according to reports. The Stena Impero tanker "was confiscated by the Revolutionary Guards at the request of Hormozgan Ports and Maritime Organisation when passing through the strait of Hormuz, for failing to respect international maritime rules," the Guards" official website Sepahnews announced. The UK government convened an emergency COBRA meeting to formulate its response and a foreign ministry spokesperson said: "We are urgently seeking further information and assessing the situation following reports of an incident in the Gulf." Prime Minister Theresa May"s office declined to comment. The Foreign and Commonwealth Office relayed a statement from foreign minister Jeremy Hunt, in which he appeared to confirm the seizure of a second vessel. He said: “I’m extremely concerned by the seizure of two vessels by Iranian authorities in the Strait of Hormuz. “I will shortly attend a COBRA meeting to review what we know and what we can do to swiftly secure the release of the two vessels - a British-flagged vessel and a Liberian-flagged vessel “Their crews comprise a range of nationalities, but we understand there are no British citizens on board either ship. “Our Ambassador in Tehran is in contact with the Iranian Ministry of Foreign Affairs to resolve the situation and we are working closely with international partners. “These seizures are unacceptable. It is essential that freedom of navigation is maintained and that all ships can move safely and freely in the region.” Arab News contacted Col. Robert Stewart, Conservative MP and former UN commander in Bosnia, who said that the UK government would have to "look at all the options" in its response to Iran"s behaviour, adding that Iran"s actions were an escalation too far, "of course." Refinitiv data showed the Stena Impero was a British-flagged vessel owned by Stena Bulk. It showed the vessel"s destination as the Saudi port of Jubail on the Gulf. The map tracking the ship"s course showed it veering off course with a sharp turn north at about 15:17 GMT on Friday and heading towards the Iranian coast. Meanwhile, the head of the UK Chamber of Shipping said on Friday that further protection must be provided for merchant vessels after the seizure. "We condemn unreservedly the capture of Stena Impero as she transited the Strait of Hormuz earlier today," the Chamber"s chief executive, Bob Sanguinetti, said in a statement. "This incident represents an escalation. Whilst we call for measured response, it is also clear that further protection for merchant vessels must be forthcoming to ensure enhanced security to guarantee free flow of trade in the region." The Stena company responsible for the ship also released a statement, which read: "Stena Bulk and Northern Marine Management can confirm that at approximately 1600 BST on 19th July, UK registered vessel Stena Impero (built 2018, 49,683 DWT) was approached by unidentified small crafts and a helicopter during transit of the Strait of Hormuz while the vessel was in international waters. We are presently unable to contact the vessel which is now heading north towards Iran. There are 23 seafarers aboard. There have been no reported injuries and their safety is of primary concern to both owners and managers. The priority of both vessel owner Stena Bulk and ship manager Northern Marine Management is the safety and welfare of the crew. Iran"s Ayatollah Ali Khamenei earlier this month accused the UK of “piracy” after the Royal Marines and Gibraltarian police seized a tanker believed to be carrying Iranian crude oil to Syria on July 5, and the Iranian government has demanded its immediate release. The ship was detained on suspicion it was breaking European sanctions by taking oil to Syria.