Heavy smoke was visible from inside the campus of Al-Azhar University on Tuesday as fresh clashes erupted between pro-Morsy students and security forces. Students threw rocks, and police responded with tear gas.
Security forces stormed the campus after students closed a number of university buildings using chains, preventing other students and staff from entering.
Pro-Muslim Brotherhood protests have swept universities since the new academic year started in September.
Their demands include the return of deposed president Mohamed Morsy and the release of fellow students who were arrested in recent months. Daily battles between students and police have left a number of students dead.
On Monday, hundreds of pro-Morsy students from Ain Shams University blocked al-Khalifa al-Maamoun street, bringing traffic to a complete stop.
Edited translation from Al-Masry Al-Youm