Hundreds of anti-Morsi demonstrators have gathered in Cairo's Tahrir Square to celebrate the 40th anniversary of the 10th of Ramadan War with Israel and the success of the 30 June protests that led to the removal of president Mohamed Morsi.
The event will officially begin after the fast-breaking Muslim meal of Iftar at sunset.
Demonstrators have been chanting in support of the army.
Popular committees have been checking the identity cards of people entering the square, state news agency MENA reported.
The event was organised by Rebel (Tamarod), which spearheaded the 30 June protests, and the 30 June Front.
Meanwhile, across town, anti-Morsi protesters flocked to the presidential palace in Cairo's upscale Heliopolis district, another major venue of mass protests culminating in the Islamist leader's overthrow, shortly before the Iftar.
Police and military armoured vehicles have been posted in the vicinity of the protest site, state news agency MENA said.
Merghany Street, where the palace is located, has been closed to traffic by military vehicles so as to prevent pro-Morsi marches from accessing rival rallies.
Morsi loyalists have been staging mass protests in Cairo and a number of governorates. They condemn what they say was a coup d’état against Egypt’s first democratically elected president. They have been chanting against army chief Abdel-Fattah El-Sisi, who they label a traitor for deposing Morsi.
Morsi was removed from the presidency on 3 July following nationwide protests against his rule. The army has presented a roadmap, supported by non-Islamist political parties, for a return to democratic rule.
Morsi's Muslim Brotherhood and other Islamist groups reject the roadmap. They also refuse to acknowledge interim President Adly Mansour, who was sworn in a few days after Morsi’s removal.