http://www.bbc.co.uk/news/world-middle-east-12433758
Opposition websites say at least eight people close to opposition leader Mir Hossein Mousavi have been detained.
They include his brother-in-law, former minister Mohammad Hossein Sharifzadegan.
On Thursday, another opposition leader, Mehdi Karroubi, was placed under house arrest.
http://www.bbc.co.uk/news/world-middle-east-12447225
The fiercest clashes were reported on Azerbaijan Street, close to Azadi Square, and a number of ambulances were seen coming and going. Witnesses told the Associated Press news agency that at least three protesters were wounded by bullets, with dozens of others beaten by the security forces and taken to hospital.
Iran's semi-official Fars news agency reported that one person had been shot dead by protesters and several others wounded.
Mr Mousavi's website, Kaleme.com, said that - according to unconfirmed reports - "hundreds of protesters" had been arrested. There has been no official confirmation, but witnesses told BBC Persian that dozens had been taken away in police vans from the area.
The antisemite bunch howls to the death when an Israeli committee is formed to investigate biased NGOs' foreign money but remain silent when blattant violations of human rights are committed... in Iran.
Double standards are a sure sign of antisemitism.