With foreign media blocked by the Iranian government from covering much of the chaos unfolding in the streets of Tehran, citizen reporters have used the Web to help disseminate information to the outside world.

Twitter and Facebook have become key lifelines for Iranian supporters of opposition leader Mir Hossein Mousavi. Amateur videos posted there and on YouTube and other Web sites appear to show riot police and militia members clashing with protesters.

See below for amateur video produced from inside Iran, some of which has not been confirmed as authentic:

Protesters take to the streets of Tehran.

Face-off between protesters and militia members.

Chaos in the streets of Tehran.

Protesters throwing rocks at riot police.

More scenes police facing barrage of rocks.

See below for some of FOX News' coverage of the unrest:

Dramatic Video Shows New Protests in Iran

Tumult in Tehran After Election

Sobering Images of Bombing Aftermath

How Will the U.S. Respond?

Helicopters Seen Over Immense Crowd

Getting Around the Media Blackout

Police and Protesters Clash in Iran