Big surprise here. From Iran Focus, with thanks to Mackie:
London, Mar. 31 — Iran’s main opposition movement, the National Council of Resistance of Iran (NCRI), said on Saturday that Iran’s Islamic Revolutionary Guards Corps (IRGC) had planned the recent capture of 15 British marines and naval personnel and are holding the group in an effort to gain concessions from the West.
A unit of the IRGC Navy”s 3rd regional command based in Khorramshahr Garrison executed the premeditated operation to capture the Britons on March 23, said Hossein Abedini, a member of the NCRI”s Foreign Affairs Committee, at a press conference in London. He said that the garrison was on a full state of alert.
“Rear Admiral Rashid Hosseini, the commander of the IRGC Navy”s third regional command, personally had command of the operation to arrest the British sailors”, he told reporters.
“A number of IRGC Navy commanders had previously been stationed in Khorramshahr. Colonel Badin was the operational commander based in Khorramshahr at the time of the arrests”.
He gave the names of three IRGC officers – Colonel Majidi, Colonel Abbas-Zadeh, and Colonel Isavi — who were involved in the seizure.