Footage sent to BBC Persian TV from unconfirmed sources
The foreign media in Iran are facing sweeping restrictions, with official permission needed to attend or report on demonstrations.
With traditional forms of communication blocked, Iranians are using technology to keep the world informed about events.
Middle East political and security analyst James Spencer told the BBC: "As foreign correspondents find their work restricted and their visas curtailed, the ubiquity of the mobile phone... is coming to the fore.
Among the various impediments to reporting, there's a huge ongoing, informed and informative discussion in Iran between people who care deeply about what is happening there
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