Amateur video appears to show people doing what they can to escape the gunfire in Egypt.
The video, which can not be independently verified by Reuters shows people trying to slide down a wire cable from a bridge to avoid violence.
Dozens are already reported dead, in what has been called a "Day of Rage" by Islamist followers of ousted President Mohamed Mursi.
The violence follows Wednesday's bloodshed when hundreds died as police moved to clear protest camps in Cairo.
Deeply polarized after months of political turmoil, Egypt now stands close to the abyss of chaos with no side showing signs of backing down.