Something is happening here, but no one knows what it is. From AP, with thanks to EPG:
TEHRAN, Iran - Iran confiscated three British military vessels Monday and arrested eight armed crew members, state-run television reported.The three British ships entered Iranian territorial waters not far from the Iran-Iraq border, the Arabic language Al-Alam television reported. The station is part of the state-run Iranian radio and television network. ...
In London, the Ministry of Defense said it was investigating the report but did not know if it was true. There were no British warships operating in the Shatt al-Arab waterway, but some smaller vessels were there, the ministry said. ...
The Foreign Office said British diplomats in Tehran had been in contact with the Iranian government but it was still unclear what had happened.