Protesters have put up 15 tents at Egypt's Defence Ministry starting a sit-in to demand that President Mohamed Morsi is dismissed from office and that executive power be handed over to Defence Minister Abd El-Fatah El-Sisi.
About 200 protesters remain at the ministry's headquarters in Cairo's Abbasiya district after hundreds staged a demonstration at the site Friday voicing their demands.
The protest was initially called for by far right television presenter Tawfik Okasha.
Egypt is anticipating mass nationwide protests 30 June against Morsi — who hails from the Muslim Brotherhood group — aimed at forcing him to step down followed by early presidential elections.
The 30 June call made by the Rebel campaign, and supported by several opposition groups, including the National Salvation Front (NSF), did not cite the military as an alternative to Morsi's rule and opposes this option.
Some participating groups, including the Revolutionary Socialists, have come out clearly against the military and the police taking a role, as well as any participation by figures from the former Mubarak regime.