Experts note the blackout is unprecedented in its extent but also selective, allowing some government communications

This is a breaking news story.

All communication and information flows out of and within Iran were down overnight and into Friday due to a total Internet blackout amid grave unrest.

Experts note the blackout is unprecedented in its extent but also selective, allowing some government communications

Despite internet blackout, a small number of Iranians are risking their lives to share messages as protests continue