Al Jazeera has obtained footage showing violent clashes between pro-democracy protesters and supporters of Hosni Mubarak, Egypt's president.
In one clip, showing events on the night between February 2 and 3, Mubarak loyalists are seen driving into a crowd of protesters, who then set upon them.
In another, shots are fired on protesters on a bridge.
Al Jazeera's Andrew Simmons in Cairo has more.
This report contains images which some viewers may find distressing
Source: Al Jazeera