The decree issued on Sunday granted army officers the authority to arrest civilians to ``maintaining public order’’ in the lead up to the Dec. 15 referendum on the constitution, which was drafted by constituent assembly.
Opposition groups have called for more mass protests to denounce the referendum, which they say undermines democracy.
In an attempt to defuse tensions, Morsi annulled a decree he issued on Nov. 22 that made all his decisions immune to judicial review, but insisted that the constitutional vote would go ahead.
The army last week deployed tanks around the presidential palace in Cairo and built a wall of concrete blocks to prevent opposition protesters from reaching the complex after deadly clashes in the area between opponents and supporters of Morsi.
Five people were killed and hundreds were injured in the violence, which underscored deep divisions in Egypt almost two years after the popular revolt that forced Hosni Mubarak to resign.
Egypt's main opposition coalition, the National Salvation Front, rejected the referendum saying it will lead to more divisions and tensions. (dpa/NAN)