Peter Bouckaert of Human Rights Watch:
We are in East Alexandria. Immediately after prayer, the people came out of mosque with banners and started marching, shouting 'we are peaceful, we are peaceful'. Security arrived and immediately began shooting teargas and rubber bullets at peaceful protesters, about 600. Then one-hour rock throwing clash, but police didn't advance more than one block and kept being pushed back. Then a massive column of protesters came from the other direction and blocked in police, holding up their hands and shouting we are peaceful. Right now police is held up in the yard of mosque and protesters all around, police can't move. They repeatedly ran out of teargas and begged protesters to stop, protesters telling them to join them.
(later) The police have now given up fighting the protesters. The police and protesters are now talking, with protesters bringing water and vinegar (for teargas) to the police. Afternoon prayer has just been called and hundreds are praying in front of the mosque in east Alexandria.(originally a comment in this metafilter thread)