Protesters opposing Egyptian President Mohamed Mursi gesture on a burnt riot police vehicle after protesters seized it from the Qasr al-Nile bridge during previous clashes with riot police at Tahrir Square.

Egyptian opposition groups are calling for more protests against President Mohamed Morsi.

It follows the country's main parties signing an agreement condemning recent violence and calling for dialogue with the government.

The document is an attempt to end violent demonstrations that have killed 54 people across the country in the past week.

Most of the dead were from the city of Port Said. The violence there began after 21 local football fans were sentenced to death for their involvement in Egypt's worst ever soccer riot.

Calm has returned to the city, but many fear violence could return.

Al Jazeera's Hoda Abdel Hamid reports.