Liberal forces striking in Tahrir Square against Egypt’s president hold him fully responsible for, what they described as, “crimes of murder, torture and arrests carried out by the Interior Ministry against protesters”.

In a statement on Sunday, the “National Forces Coalition”, that groups several liberal groups, announced that its Tahrir sit-in will continue until the “unconstitutional” and “dictatorial” decrees of President Mohamed Mursi are reversed.

Signed by more than 35 political movements and parties, the statement demanded the dissolution of the constituent assembly that is drafting the country’s constitution, the sacking of the Interior Minister and a cabinet reshuffle.

Outrage broke out on Thursday when Mursi issued constitutional decrees expanding his powers.

The statement denounced the “stubbornness” of Mursi, the Brotherhood and its political arm, accusing them of ignoring the demands of political forces, and the Interior Ministry for continuing to use excessive violence against protesters.

Documentaries will be displayed and a seminar where prominent politicians will speak will be held in the sit-in on Sunday while students of two Cairo universities have organized marches in solidarity with the sit-in.