Description:Clashes in Cairo once again as stone-throwing demonstrators target security forces around Tahrir Square. At least 100 protesters retaliate against the police, throwing stones and creating barricades for protection. The clashes follow a day of violence around Tahrir Square on Friday, when anger at alleged excessive force by security forces turned the city centre into a smoke-filled battleground. Eight people have been killed and more than 300 wounded in the clashes so far.(1:09)