After Friday prayers, thousands of supporters of the ousted Egyptian President Mohammed Morsi poured out of the mosques and flooded the streets in defiance of a military imposed state of emergency.
Today's demonstrations are apparently in response to the Muslim Brotherhood's call for "A Day of Rage."
There are reports of casualties, including of police and protesters.
- Bethany Bell, foreign correspondent for the BBC. She tweets @BethanyBellBB.
This segment aired on August 16, 2013.