Enduring America is up and live-blogging:
0930 GMT: Rah-e-Sabz has more [link] on what appears to be a Government raid on the offices of the Assembly of Teachers and Researchers of Qom. Earlier it was reported that Hossein Mousavi Tabrizi, the head of the Assembly, was arrested.
0845 GMT: The Regime (Tries to) Strike Back. Unconfirmed reports that, in addition to the arrest of prominent reformist Ebrahim Yazdi, Iranian authorities have detained Mir Hossein Mousavi’s advisors Mohammad Baghriyan and Ghorban Behzadian-Nejad.