Violence continues to erupt across Egypt after the Muslim Brotherhood and other groups, under the banner of the Anti-Coup Alliance, called for protests in defiance of a security crackdown on sit-ins that had left more than 600 dead since Wednesday.

Ahmed Farahat, a 16-year-old protester, was among those killed as he tried to flee unrest near the Rabaa mosque in Cairo on Wednesday.

Farahat's friends say he was shot along with another friend who was trying to rescue him.

Al Jazeera's Bernard Smith reports from Cairo.

Source: Al Jazeera