Cairo - Violent clashes have erupted in Cairo and three other Egyptian cities between police and university students loyal to the ousted president Mohammed Morsi.
In Cairo, police and students from Ein Shams university fought pitched street battles for hours, with police using tear gas and the students pelting them with rocks. Police helicopters hovered above as the fighting continued.
In Assiut, about 400km south of the capital, 45 people, including 15 schoolgirls and two policemen, were injured when police and university students clashed. Seven students were arrested.
Clashes also broke out on Tuesday in the Mediterranean city of Alexandria and in Mansoura, north of Cairo.
Nearly daily violent clashes between Islamist students and police have been taking place since the military ousted Morsi in July.