Supporters of President Mohammed Morsi of Egypt are gearing up to the planned mass rally in solidarity with the president over his sweeping new powers and the drafting of a constitution opponents say is too Islamist.
The demonstration in Cairo comes after days of rival protests by supporters and opponents of the president.
His opponents are angry that the draft constitution was hastily backed by the Islamist-dominated assembly on Friday.
Egypt’s top court is to rule whether the assembly should be dissolved.
Senior judges have been in a stand-off with the president since he granted himself sweeping new powers last week.
Saturday’s mass rally in support of Mr Morsi near Cairo University has been called by the Muslim Brotherhood and other Islamist parties.
They say a huge turnout would show that the president’s recent moves are supported by the public.
Under an emergency decree issued last week, Mr Morsi’s decisions cannot be revoked by any authority, including the judiciary, until the new constitution has been ratified and a fresh parliamentary election held.
It also states that the courts cannot dissolve the constituent assembly.
Mr Morsi says he will give up his extraordinary powers once the new constitution is approved by a referendum.
The president is expected to ratify the draft later on Saturday before putting it to a popular vote.
