Western journalists have been more or less banished from Tehran for the time being. Michael Slackman reports from Cairo:

Iran’s government said Sunday that it had arrested Iranian employees of the British Embassy, while the police in Tehran beat and fired tear gas at several thousand protesters who joined a demonstration at a mosque in support of defeated presidential candidate Mir Hussein Moussavi.

This is said to be an escalation between the Iranian authorities and Britain (which incidentally played a major role in the 1953 MI-6/CIA coup against Mossadegh). The United Kingdom has been accused, on the basis of no evidence, of instigating the demonstrations of the past two weeks.